Photographic lenses and apparatus : galilean field and opera glasses, stereoscopic prism binoculars

- - GENERAL CATALOGUE
  - Established 1832
  - one 4
  - E
  - a
  - 3
  - 9
  - 5
  - PARIS
  - 18-20, Rue de Naples
  - .KRAUSS
  - Optical
  - and
  - Scientific Instruments
  - A A yanst
  - Branch at TOKYO
  - Branch Works at DREUX (Eure-et-Loir)
- p.n.n. - vue 1/76
- p.n.n. - vue 2/76
- - "Established in 1882
  - E. Krauss
  - OPTICAL AND SCIENTIFIC INSTRUMENTS
  - Contractor to the Admiralty and War Office of France and other countries
  - PHOTOGRAPHIC LENSES AND APPARATUS
  - Galilean Field and Opera Glasses Stereoscopic Prism Binoculars — Telescopes Microscopes — Magnifiers
  - - J (KRAUSS) A 1
  - 1 rade PARIS IVlark
  - OFFICES, SHOW ROOMS AND FACTORY AT
  - 16, 18, 20, Rue de Naples — PARIS (VIII)
  - Branch Works at Dreux (Eure-et-Loir)
  - Telegraphic Address : LILLIPUT-PARIS
  - Telephone WAGRAM 4€-15
  - TOKYO -:- -:- -:- PETROGRAD
  - X-1924
- Page de titre 1 - vue 3/76
- - —...............—I E. Krauss, 18 ET 20, Rue de Naples,- PARIS
  - METRIC AND ENGLISH MEASURES
  - 4
  - %
  - All dimensions in this catalogue are given in metric units. To assist our English readers in converting those into English inches we append a LP conversion table ranging from 0 to 6 inches and from 0 to 15 cm. In addition, we have added to this a table showing side by side the standard English plate sizes with their continental equivalents.
  - cn — —--------- Inches cm,
  - E 2 5/16 x 13/4............................................ 4.5 x 6
  - = =-----------2 2 1/2 x 15/8............................................ 4 x 6.5 --------------=-------------2 x 3............................................................................................................................................................................................................... 5 x 8 _H------------2 1/2 x 2............................................1/2.........................................6x6 =—------------3 1/2 x 21/2 6.5 x 9 --------------3 1/2 x 3............................................1/2 9x9 _-------------==-----------~ 4 1/4 x 3 1/4........................................1/4 plate............................... 8.3 x 10.8 --------------4 1/4 x 2............................................1/2.........................................6.5 x 11 *-------------= ~----------43/4 x 3............................................1/2......................................... 9 x 12 — ——----------5 1/2 X 3............................................1/4.........................................Postcard................................. 8 X 14 P-------------5 1/2 x 3............................................1/2.........................................Postcard................................. 9 X 14 = A 6 X 4............................................Postcard............................................................................................................ 10 X 15 a-------------=—-----------5 x 4........................................................................................ 10 x 12.5
  - 3 1/4 Stereoscopic................................. 8 x 17
  - 43/4 1/2 Plate.................................. 12 x 16.5
  - 6 1/2 1/1 Plate................................. 16.5 x 21.5
  - 8 20 x 24.5
  - 6 3/4 x
  - 6 1/2 x
  - 8 1/2 x
  - U/UL
  - — 12 x 10 ........ 24.5 x 30.5
  - = 15 x 12 ........................................... 30.5 x 38
- p.2 - vue 4/76
- - 1 E. Krauss, 18 ET 20, Rue De Naples, Paris £
  - Business Terms
  - co co -
  - This catalogue supersedes all previous editions. All prices are subject to alteration without notice. They do not include the cost of packing, insurance, and carriage from the works.
  - Our invoices are payable in Paris. They are for prompt cash and are not subject to any discount or other deduction.
  - Our bills of exchange or acceptance of payment are not to be regarded as a waiver of the latter condition in a legal sense.
  - To customers who have no account with us goods are forwarded against payment with order or for cash on delivery. Business houses who are not known to us as dealers in photographic goods are requested to send us their catalogue or to furnish references to business houses dealing in optical and allied goods or an official document certifying the fact that they are dealers in such goods.
  - Goods are despatched at the cost and risk of the consignee. Packing is charged for at cost price and is not returnable. All consignments are insured by us against loss or breakage. On the other hand, we accept no responsibility for any damage which the goods may sustain during transit, as they are packed with the utmost care. In the event of it being intended to make a claim for loss or damage the consignee should send us a substantiated statement of his claim. In the absence of special instructions goods are sent by us by what we regard as the most suitable root.
  - The illustrations and particulars as to dimensions and weight given in this catalogue are not to be regarded as binding upon us in every detail.
  - Note. Owing to the existing state of the market the prices quoted in our various lists are subject to sudden variations and cannot therefore be guaranteed. The actual prices invoiced and charged are those ruling at the time when delivery is made.
  - Moreover, for the same reason, the fact that an article figures in our catalogue does not imply that :t is always in lock, and consequently it does not bind us to make immediate delivery.
  - < -
  - Claims
  - < ~ <
  - Although the severe tests to which our instruments are subjected obviates almost entirely every cause for complaint, we are nevertheless prepared to give due consideration to any objection, provided it be addressed to us within eight days after the receipt of the goods, but it must be understood that in the event of such claims proving unfounded, or if it is shown that the defect, if any, did not emanate from our workshops, the purchaser undertakes to refund the cost occasioned by such objections.
  - 3
- p.3 - vue 5/76
- - -=======-=-=====E. KRAUSS, 18 ET 20, RUE DE NAPLES, PARIS ========-
  - FIRST PART
  - KRAUSS and KRAUSS-ZEISS Photographic Lenses
  - ~o <8 ~o
  - Guarantee. All our apparatus and lenses are guaranteed to be of faultless quality and will not fail to give excellent results within reasonable limits. This guarantee signifies a readiness on our part to repair or replace admittedly defective parts, but dees not imply any further obligation.
  - We decline responsibility for any damage which has arisen in consequence of the purchaser of an instrument having dismounted it or any part thereof or attempted to introduce any alteration on his own initiative.
  - Choice of Glass. The glasses which we employ in the making of our lenses are selected with Air Bubbles, the utmost care, in order to rigorously exclude any material which may be vitiated by striae and strains. Experience extending over more than thirty years has sufficiently demonstrated the permanence of these materials. As far as practicable we also avoid the presence of air bubbles. It should, however, be noted in this connection that the high degree of correction which is attained in our lenses demands the use of certain kinds of glass endowed with very special qualities, and that it is practically impossible to obtain these free from air bubbles. These blemishes are purely artistic and have no effect whatever upon the optical quality of the lenses. Their sole effect, if any, is to cause a wholly inappreciable loss of light of the order of 1/5000. On no account therefore can we admit the observed presence of these small air bubbles as a reasonable ground of objection.
  - Focal Length. The focal length, briefly referred to as " Focus ”, is the distance of
  - Camera Extension. the image from the second principal point for an infinitely distant object. In all the tables contained in this catalogue the term “ camera extension ” signifies the distance between the back of the lens ring and the ground glass focussing plate when set to infinity. This applies to all lenses in standard mounts or in helical focussing mounts. In the case of lenses mounted on shutters of the Compur type this distance is reckoned from the position of rest of the shutter. In the various tables and descriptions in which the shutters are specified the term Compur is indiscriminately applied to shutters of the Compound type (with pneumatic release) and those of the Compur type. The Compur shutter comprises the models Nos. 00 to 2 in Body No. VI, while beyond No. 3 with Body No. VII it becomes a Compound shutter (see Table of Compur Shutters, p. 31).
  - Stereoscopic Leases. In order that two lenses may be stereoscopically paired it is necessary, not only that they have the same camera extension, as above defined, but also that their focal lengths, reckoned from the second principal point, may be identical. If these two conditions be not fulfilled with that degree of precision, as obtains in our lenses, stereoscopic pairing cannot be effected for all distances.
  - 4
- p.4 - vue 6/76
- - -===========E. KRAUSS, 18 ET 20, RUE DE NAPLES, PARIS------------
  - Variation in The focal lengths and camera extensions stated in this catalogue are mean Focal Length. values, which are subject to a tolerance of 3 per cent either way.
  - Cleaning Care and cleanliness are essential to success in photography, and in order that a good Lenses. lens may permanently maintain its fine optical qualities it is desirable to clean from time to time its exposed surfaces if upon examination they are found not to exhibit their accustomed transparency.
  - It may not be out of place to lay stress on the very pronounced influence which the presence of dust, and more especially that of grease on the lens surfaces has upon the clearness of the image. Above all, one should avoid allowing the fingers to come in contact with the lens surfaces and to leave their print there.
  - Many lenses have passed through our hands which furnished badly fogged negatives and gave rise to a very pronounced halo, and yet where simple cleaning sufficed to restore their marvellous qualities.
  - No hesitation need be entertained in unscrewing the barrel of our lens mounts. The screw threads are so formed that they cannot run out of centre, provided that they are screwed on with proper care. Next, all dust particles should be removed with a soft badger hair mop, after which the glass surfaces should be wiped with a piece of very fine linen or worn cotton applied in the dry state, but no leather, wool, silk or other material of an animal origin should be employed.
  - In order to clean lenses which are too small to admit of applying a rag wrapped round a finger one may use the end of a stick of elder pith.
  - No liquid should ever be employed for cleaning lenses.
  - Oxidation. After the lenses have been in prolonged contact with the moisture of the air or with corroding substances, or if a film of fungoid growth should form on the surface, iridescent patches may appear which even after wiping remain visible, though only by reflection and not when looking through the lens. These are due to tarnish.
  - Choice of a The camera should match the lens in quality, and rightly our lenses should only Camera. be associated with an apparatus which is sufficiently accurate in its movements if it is to bring into play all their excellent qualities. It is therefore not good enough to possess a good objective; it requires also a camera which in its way is likewise, an instrument of precision.
  - Size of the In the tables given in subsequent pages, with the exception of copying lenses, sharp image . the size of the sharp image or the covered surface, applies to landscape views or Depth of focus, to instant photographs, and it is assumed that the objects are at a great distance. The covered surface increases when stops are employed. Naturally, the sharpness in the direction of depth receives no consideration in these tables, since the depth of focus, as the sharpness in depth is called, is solely governed by the focal length, the relative aperture and the distance of the object upon which the lens is focussed. The depth of focus is a purely geometrical quality of the lenses and has nothing to do with a special correction.
  - Two lenses of similar focal length, whatever their type of construction, will always have the same depth of focus when used with similar stops. We specially mention this aspect, as very often expression is given to entirely erroneous notions on this point. There are indeed certain lenses which, owing to the fact that they do not produce perfectly sharp images, seem to have a greater depth of focus than others. This, however, is merely an illusory effect obtained at the cost of the general sharpness of the image.
  - Relative The relative aperture, or the rapidity, of a lens, for instance F/6.3, is the ratio be-Aperture. tween the focal length of the lens and the diameter of its clear aperture, i. e. the dia-
  - 5
  - *
- p.5 - vue 7/76
- - [ --------1 E. Krauss, 18 ET 20, Rue DE Naples, Paris 1 ---------------- — |
  - meter of the pencil of light at its entrance into the lens. This relative aperture supplies a measure of the rapidity of the lens, in that the light transmitting power is inversely propor-tional to the squares of these numbers.
  - Brightness of In accordance with the laws of optics the brightness of the image diminishes, the Image. from the centre to the edge by reason of the increasing obliquity of the pencils.
  - Another cause of this diminution is the interception ot the outer pencils by the edges of the lenses.
  - The second cause can be neutralised by introducing a stop of medium size. The first named cause cannot be overcome in any way, but the effect of the decreasing intensity can be mitigated most successfully by a slight overexposure.
  - Inscription Our lens mounts bear only particulars relating to their stops. The on the lens mounts, name of our firm and the designation by which the lens is identified are engraved upon the front part of the lens mount. Each lens is iden-tified by its type, its rapidity, its focal length, and its factory number. For example, thus :
  - Zeiss Tessar F/4.5, f. = 21 cm. Brevete S. G. D. G. No. 141,229. E. Krauss, Paris.
  - The Double Protar, made up of two members, cannot be engraved as a whole, in that it only comes into existence by the combination of those two members. Hence in their case the engraving on the mount of the component single Protar lenses takes the place of the engraving on the combination mount.
  - For example, thus :
  - Zeiss Protar Lens F/12.5,f = 35 cm. Brevete S. G. D. G. No. 132,462. E. Krauss, Paris.. Zeiss Protar Lens F/12.5,f = 29 cm. Brevete S. G. D. G. No. 132,469. E. Krauss, Paris. This combination furnishes a Double Protar VII a, F/7,f = 18.5 cm. (712 in.).
  - The term "Anastigmat ”, which we adopted to characterise our first objectives, is a scientific term and has since been used by several other makers. We have now abandoned this term as a distinctive name and have replaced it by the registered name " Protar ”, which applies exclusively to our objectives of the Series V, VII and Vila. The change applies to the name only, and it goes without saying that the lenses themselves have under gone no change.
  - The word Protar has been registered for the legal protection of the lenses, and the same applies to the names Tessar and Trianar of our new series.
  - RESPECTING CHANCE PURCHASES.
  - The excellence of our products, the name of which is a guarantee of quality, has not failed to encourage many imitations.
  - The best means of avoiding any disagreeable surprise or even responsibilities, every time that a chance opportunity arises of purchasing a lens, is to send the instrument to the maker, who will promptly return it and state whether the lens is of his make or not. In the event of the answer being in the affirmative and if the purchase has already been concluded the purchaser should always demand from the vendor a bill stating the professed maker’s name.
  - The purchasse of a lens is a sufficiently important matter to justify a delay of a few days which may be the means of guarding against a costly and vexatious imposition and at the same time serves to protect the maker’s rights.
  - (Extract from the circular of the Associated Chamber of Makers of and Dealers in Photographic Goods, dated 22nd. August 1908.)
  - 6
- p.6 - vue 8/76
- - -= E. KRAUSS, 18 ET 20, RUE DE NAPLES, PARIS ---------
  - GRADUATION OF THE STOPS
  - In graduating our stops we have followed the convention adopted by the International Congress of Photography of 1900.
  - The numbers engraved on the mount are the denominators n of the relative apertures F/n corresponding to the respective stops.
  - These numbers n form a geometrical progression with 1 for its first term and the square root of 2 for the constant factor, 1. e.
  - 1 1.4 2.8 4 5.6 8 11.3 16 22.6 32 46 ... etc.
  - Since the times of exposure are proportional to these numbers i. e. n2, it follows that the series corresponding to the times of exposure is a geometrical series in which each term is double that of the preceding one, viz.
  - 1 2 4 8 16 32 64 128 256 1024 2048. ...
  - These apertures, which are part of the adopted series, are such that the time of exposure varies in mul-iples of 2 from one stop to the next smaller one, and are marked on the barrel by short strokes.
  - The largest apertures, which do not always correspond to numbers in the standard series, are indicated by a dot. Between this dot and the first stroke the rule of doubling the exposure does not hold, so that within these limits one has to revert to the rule of squares.
  - To indicate the nature of this graduation and to show that it merely gives the relative apertures without any conventional reduction in terms of intensity or time of exposure, the graduation is preceded by the letter F.
  - We have in the past employed various systems of notation, but they all were such that the time of exposure had to be doubled when a transition was made from one aperture to the next smaller one.
  - Graduation in millimetres.
  - The mounts of the lenses of Series VII and VIIa and of the convertible sets can be fitted with several lenses, and hence it is impracticable in their case to provide a graduation to conform to the relative apertures of each combination. We employ therefore a graduation in millimetres which gives the diameter of the mechanical aperture, the corresponding relative aperture for which is to be looked up in the tables supplied with each of these objectives.
  - Other Notations of the Stops
  - In all these notations neither the starting point nor the scale numbers are the same, but all have this in common that the amount of light which passes through a diaphragm is one half that transmitted through the preceding and double that transmitted through the next diaphragm.
  - Date Author or Origin Graduation in terms of — Unit
  - 1872 Adopted in 1900 Gradua 1890 1895 Intensities W. E. Debenham U. S. A. at the International Photographic Congress tion F/ 1 — 1.4 — 2 — 2.8 -4 — 5.6 Dr. Rudolph for Carl Zeiss 1 2 4 8 16 32 Relative apertures Relative apertures - 8 — 11.3 — 16 — 23 - Relative Intensities 64 128 256 512 F/4 F/1 -32—45 1 = F/100 1 = F/ 50
  - Relative Apertures 1890 F/100 72 50 36 25 18 1895 F/ 50 36 25 18 12.5 9 12.5 9 6.3 4.5 6.3 4.5 - -
  - 1889 1891 First International Photographic Congress Relative exposures 1 - F/10
  - Notation 0.2 0.25 0.5 1 2 4 8 16 32
  - Relative a pertures F/4.5 5 71014. Royal Photographic Society of Great Britain Notation ! 2 4 8 16 32 20 28 40 56 | Relative exposures 64 128 256 11 - F/4
  - Relative a 1886 pertures F/4 5.6 8 11.3 16 23 Dallmeyer (better known, as Dr. Stolze’s) Notation 1 3 6 12 24 3 2 45 64 Relative exposures 48 96 192 384 1 - F/V/10
  - Relative apertures F/3.16 5.5 7.7 11 15.5 22 31 44 62
  - 7
- p.7 - vue 9/76
- - I * E. Krauss, 18 ET 20, Rue DE Naples, Paris j - J
  - LENS MOUNTS
  - Our lens mounts are catalogued and supplied in the ordinary way in the mounts described below. For the convenience of camera makers we are prepared to supply our lenses in special mounts.
  - Standard Mount N
  - Sunk Mount R
  - Helical Focussing Mount H
  - The Standard Mount N is in the form of a cylindrical tube of polished brass, lacquered brass colour or black, with iris-diaphragm and flange. This form of mount is adapted for travelling and studio cameras.
  - The Sunk Mount R, of brass, lacquered black, with iris-diaphragm, is specially designed for reflex cameras, folding cameras with struts, and focal plane folding cameras. The mount sinks almost entirely within the camera.
  - The Helical Focussing Mount H, with iris-diaphragm is intended for folding cameras with fixed extension. It consists of two tubes, one of which slides within the other and is constrained to move in and out by a pin and helical slot a means of focussing. The distances of the object are inscribed on the mount from infinity to 2 yards. This mount likewise sinks into the camera.
  - For the use of camera makers we append on page 11 a table of the principal dimensions and leading particulars of our standard, sunk, and helical focussing mounts.
  - The camera extensions are given for each lens and for each of the mounts in the tables relating to the various lens series.
  - Compur Shutter Mount C. The central shutter serves as the mount and accommodates the iris-diaphragm. The Compur Shutter is universally acknowledged to be the best diaphragm shutter in existence (For description see page 31).
  - 8
- p.8 - vue 10/76
- - E. Krauss, 18 ET 20, Rue de Naples, Paris
  - CHARACTERISTIC FEATURES
  - OF THE
  - KRAUSS and KRAUSS-ZEISS Photographic Lenses
  - The Krauss-Zeiss Tessars Ic, F/4.5 and II b,F/6.3 are chiefly distinguished fortheir superb and uniform definition over a comparatively large field, in consequence of which the resulting negatives will bear being very considerably enlarged. These lenses are not separable. The Tessar Ic, F/4.5 has a rapidity which is double that of the Tessar II b, F/6.3. On the other hand, with the same stop, the latter embraces a somewhat greater angle. In point of definition there is a ______________ scarcely appreciable difference, in favour of the Tessar Ilb, F/6.3, when both "oniiiiiM E
  - K-eliezgoal lenses are stopped down to the same extent. The depth of focus being on also the same (for the same focal length and stop) preference should in all
  - cases be given to the Tessar Ic, F/4.5, assuming that the selected type of camera is rigid and exact enough for its attachement. When stopped down to F/6.3, the Tessar Ic, F/4.5 gives results which are in every way comparable to those obtainable with the Tessar II b, F/6.3.
  - For all photographic purposes, including the most exacting work, the Tessars Ic, F/4.5 and IIb, F/6.3, when stopped down to the same relative aperture, have a degree of sharpness which exceeds the responsive power of the usual bromide plates, even of slow fine grained plates.
  - The F/3.5 Tessar is specially intended for taking cinematograph views and for portrait work, for which purpose it surpasses the old Petzval lenses, for it is equally well adapted for taking heads, full figures, and groups. It will produce all the degrees of artistic softness, just like the Tessar Ic, F/4.5.
  - THE DOUBLE PROTAR VII® is an all-round rapid lens, giving superb definition. It is convertible and adapted for every species of amateur work with a camera with long extension;
  - - also for taking street scenes, groups, panoramic views, landscapes, por-AL traits, etc.
  - -== It is composed of two single anastigmatic Protar Lenses VII, which — ======= are completely corrected individually and with their long foci are well adapted for landscapes, large portraits, etc. The single Protar Lenses satisfy the oldest and most important rule in practical photography, which is : Always use the greatest focal length at your disposal. The single Protar Lens VII gives at full aperture F/12.5 a perfectly sharp image, a degree of flatness, and an absence of distortion which have never been surpassed or even equalled by any imitation. It is the prototype of the single lens and it should be given preference over the telephoto lens whenever the camera extension is sufficient to allow of the chosen focal length being used to full advantage.
  - The difference of rapidity between the apertures F/6.3 and F/7 being practically negligible
- p.9 - vue 11/76
- - ] - -I E. Krauss, 18 ET 20, Rug DE Naples. Paris l— —
  - (viz. as 1.25 to 1), one would always do well to choose a Double Protar composed of two Protar Lenses of different foci, which provides a choice of three focal lengths embodied in one objective.
  - In the non-symmetrical Double Protars the largest lens should preferably be placed in front. When employed singly, the Protar Lens should always be put at the back of the mount.
  - By adding to the Double Protar a third Protar Lens of a not too widely differing focal length one obtains a convertible set, which may be further completed by the addition of a WIDE ANGLE PROTAR F/18. The latter is an objective which has not its equal for the purpose of photographing interiors and monuments. Such a set furnishes accordingly a universal equipment for all purposes. The Telephoto Lenses, some of invariable, others of variable focal
  - lengths, admit of objects being taken with such large figures as it would be impossible with ordinary cameras, the extension of which would be utterly inadequate to achieve this.
  - Intermediate between the standard objectives and the telephoto lenses there are the simple Tele Lenses of the” Telar ” type, which serve to extend the focal length of standard photographic lenses and thus to take advantage of the longest extension of hand or stand cameras, so as to obtain pictures with figures a little larger than those furnished by the primary lens.
  - The KRAUSS TRIANAR F/3, F/4.5 and F/6.3. to which we wish to draw attention by a few lines, is a new anastigmatic objective made up of three lenses, which, though lower in price, _ has nevertheless qualities which it owes to a deep study and a degree of r-p • exactness in manufacture comparable to that bestowed on the Tessar. This - objective being exclusively intended for use on hand cameras of all types, we only make it at present in standard mounts with iris-diaphragm and with focal langths ranging from 15 cm. (6 in.) upwards. The smaller foci are catalogued for provisional information only.
  - The Apochromatic Tessars, finally, are special lenses computed for photo-mechanical process work in one or more colours by selection. They hold a universally justified reputation which has never been disputed.
  - 10
- p.10 - vue 12/76
- - E. Krauss, 18 ET 20, Rue de Naples, Paris
  - Tables of Lens Mounts
  - * %
  - Standard Mount N with Iris Diaphragm.
  - No. of Body Length of Body DIAMETER
  - of barrel (outside) of largest stop of hole for flange of flange (outside) of flange screw
  - mm. mm. mm. mm. mm. mm.
  - 0 16 19 10.5 23 32 20.3 pitch 3
  - 0a 11.5 19 10.5 23 32 20.3 —
  - I 16 26.5 17 32.5 44 30 pitch I
  - II 16 32 19.5 38 50 35 —
  - IP 20 32 19.5 38 50 35 --
  - III 23 36.5 23 43 47 40 —
  - IV 33 42 29.2 48 63 45 —
  - IVa 23 42 29.2 48 63 45 -
  - V 35 47 30 53.5 69 50 —
  - VI 40 51 34.4 58.5 74 55 —
  - VIs 30 51 34.4 58.5 74 55 —
  - VII 35 58 40 64 82 61 —
  - VIIa 23 58 40 64 82 61 —
  - VIII 55 58 40 64 82 61 —
  - X 60 69 48 79 97 75 -
  - X* 45 69 48 79 97 75 —
  - XII 74 84 56.5 95.5 117 90 —
  - XIIa ' 55 84 56.5 95.5 117 90 —
  - XIII 83 96 68 105 127 100 —
  - XIV 66 106.5 70.5 114 145 110 —
  - XV 103.5 115 79 126 155 120 —
  - XVI 100 127 90 136.5 164.5 133 —
  - XVII 145 153 98.5 164 199 159 —
  - Helical Focussing Mounts H.
  - No. of Body Height of Tube at back of flange Greatest Extension DIAMETER Increase of camera extension for lenses with focussing mounts
  - of largest stop of hole to be cut for flange of Flange (outside) of flange screw
  - mm. mm. mm. mm. mm. mm. mm.
  - 0a 6 4 10.5 28 37 25 5.5
  - I 9.5 8 17 38 50 35 7
  - II 13.5 12 19.5 43 57 40 8.5
  - III 16.5 13 23 48 63 45 12
  - IVa 17 14 29.2 53.5 69 50 11
  - VI 29.5 25 34.4 64 82 61 27
  - VIa 22.5 15.5 34.4 64 82 61 16
  - VII 28.5 25 40.1 69.5 89 65
  - 11
- p.11 - vue 13/76
- - —I E. Krauss, 18 ET 20, Rue de Naples, Paris 1 ----
  - Serie l° — KRAUSS-ZEISS TESSARS F/3.5 AND F/4.5
  - No. Focal Length Diameter of clear aperture Recommended for Plate size Diameter of sharp image circle with small stops MOUNTS Camera Extension FITTED TO Comour Shutter C
  - No. of Body No. of Shutter No. of Body Camera Extension *
  - Standard N Sunk R Focussing H
  - cm. mm. cm. cm. mm. mm. mm. mm.
  - TESSAR F/3.5 for Cinematograph Work
  - 0 3.5 10.5 1.2x 1.8 25 0a 31 — 36.5 00/N 0a 32
  - 0a 4 11.5 1.4x2 2.8 0a 34 — 39.5 00/N 0a 35
  - 1 5 15 1.8x2.4 3.5 1 40.5 48.8 47.5 00/N 0/1 0a I 44.5 44 5
  - 1a 7.5 21.5 3x3 5.5 Ila 62 71.9 70.5 0/N 1/N Ib IP 66.5 67
  - 2 10 27 4.5 x 4.5 9.5 III 84.5 97.5 96.5 1/III III 92
  - TESSAR F/3.5 for portraiture
  - 6 21 61 6x9 15 X 170.5 — .— 4/X XI 194.5
  - 7 25 72 9x12 18 XII 202 — — 5/XIP XII 233
  - 8 30 87 12x16 21 XIII 257 — — — — —
  - TESSAR F/4.5 for ultra-rapid snap-shots.
  - 10 4 9 3x3 4.5 0a 35 — 40,5 00/N 0a 37
  - 11 5.5 12.5 4.5 x 4.5 6.5 0a 49.5 — 55 00/N 0a 50.5
  - 11a 6.5 14.5 4.5x5 7.5 I 59 67.3 66 00/N 0a 60
  - lib 7.5 17 4,5x6 8,5 I 64,5 72,8 71,5 00/N 0a 69
  - 12a 8.5 19 6x6 10 IIa 75 85 83.5 0/1 I 81
  - 12 9 20 6x8 10.5 IIa 79 89 87.5 0/1 I 83
  - 13a 10.5 23 6x9 13 ID 93,5 103.4 102 0/L Ibsp 99.5
  - 13 12 24.8 6x9 14 III 98.4 111.4 110.4 0/L 1/N Ibsp IIa 106.5 106
  - 14 13.5 30.5 8.5x10 15.5 IVa 120 132 131 1/III 2/IV2 III IVa 127 128
  - 15 15 33.5 9x12 18 IVA 135 147 146 . 2/IV2 IVa 143.5
  - 15a 16.5 37 10x15 20 VD 147 165.8 163 2/VP VP 159.5
  - 15b 18 40 12x16 22 VI 159 188 186 2/VP VI 175
  - 16 21 47 13x18 26 VII 190.5 213 211.5 3/VII VII 205.5
  - 17 25 56 13x21 31 Xa 226 258.5 —. 4/X2 Xa 244
  - 18 30 67 16x21 37 XID 263 — — 5/XIP XI P 284
  - 18a 36 85 18x24 43 XIV 323 — - — — — —
  - 19 40 90 18x24 50 XV 363 — — — — —
  - 20 50 110 24x30 61 XVII — — — — — —
  - 12
- p.12 - vue 14/76
- - E. Krauss, 18 et 20, Rue de Naples, Paris I---------------------
  - KRAUSS-ZEISS TESSARS F/3.5 and F/4.5 — Serie 1°
  - Sta Mo Price ndard unt N Code word S Mo Price unk unt R Code word H Focussin Price elical g Mount H Code word Fitt Compur Price ed to Shutter C Code word FOCAL LENGTH
  - TESSI T Tache Taco Tabac Tabis Ture Table Tacet Talent AR F/4.5 Therme Theorbe Thesis These Thorite Tafia Teka Tebele Termite Tambour Tarte Tenon Taquet Taraud Taureau Tenue Temoin Tenaille ESSAF T for P R F/3.5 ft Tabacra Tabisra Turcra ESSAR F ortraits, Thera Thesera Thorira Tafiara Tekara Tebera Terra Tamra Tartra Tenora Taquera Taraura or Cine =/3.5 fc Group ematogra Tachus Tacocus Tabaccus Tabiscus Turcus r Portra s. Press Thermus Theorpus Therus Theserus Thorirus Tafiarus Tekarus Teberus Terrus Tamrus Tartrus Tenorus Taquerus ph Wo iture Illust rk. Tachero Tacoco Tabacco Tabisco Turcco Tableco Tacetco rations, Therco Theorbeco Thesico Theco Thorico Tafiaco Texaco Tebeco Tebeleco Termico Terraco Tambuco Tarteco Tenoco Taqueco Taraco Taureco cm. 3.5 4 5 7.5 10 21 25 30 Sport 4 5.5 6.5 7.5 8.5 9 10.5 12 : 13.5 15 16.5 18 21 25 30 36 40 50
  - •
  - 13
  - *
  - *
- p.13 - vue 15/76
- - ======== KRAUSS, 18 ET 20, RUE DE NAPLES, PARIS =====
  - Series Ilb. — KRAUSS-ZEISS TESSAR F/6.3.
  - Extra Rapid Lens for Snapshots, Groups, Landscapes, Architecture, with perfect uniformity of light
  - No. Focal Length Dia-meter of clear aperture Recom-mended for Plate size Diameter of sharp image circle with small stops MOUNTS FITTED TO Compur Shutter C
  - No. of Body Camera Extension
  - Standard N Sunk R Focussing H No. of Shutter No. of Body Camera Extension
  - cm. mm. cm. cm. mm. mm. mm. mm. |
  - 0 4 7 3x3 6 0a 34.5 — 40 00/N 0a 36,5
  - 1 5.5 9.5 4.5 x 4.5 8.5 0a 49.5 — 45 00/N 0a 51.2
  - lb 6.5 10.5 4.5x6 9.5 0a 59 — 64.5 00/N 0a 60.5
  - 13 7.5 12.5 6x6 11.5 0a 66 — 71.5 00/N 0a 67.5
  - 2 8.5 14 6.5 x 6.5 12.5 I 74.5 82.8 81.5 00/N 0a 78
  - 2b 9 15 6x8 13 I 79 87.3 86 00/N 0a 82.5
  - 3 12 19 6.5x9 17 IIa 99.5 109.4 108 0/1 I 104
  - 4 13.5 22.5 9x12 20 IIa 124 134 132.5 0/N 1/II Ib IP 130 130
  - 5 15 24 9x 14 21 III 135.5 148.5 147 0/N 1/II Ib IIa 142.5 142.5
  - 5b 16.5 26 10x15 23 III 149.5 152.5 151 I/II 1/III IIa III 157.5 157.5
  - 5a 18 31 12x16 26 IVa 165 177 176 2/IV2 IVa 173
  - 6 21 35 13x18 31 V 187.5 211.5 203.5 2/IV1 IV 205
  - VD
  - 7 25 42 13x21 38 VII 231 253.7 252 3/VII VII 245
  - 8 30 51 18x24 44 Xa 277.5 310 — 4/X2 Xa 295.5
  - 9 36 61 21 x26 53 XID 328 — — 5/XIP XID 355
  - 10 50 82 24x30 71 XIV 452 — — — — —
  - 2 60 94 30x40 85 XVI — — — — —
  - — •
  - TESSAR F/4.5. Paired for Stereoscopic Cameras
  - FOCAL Standard Mount N Sunk Mount R Helical Focussing Mount H Fitted to Compur Shutter C
  - LENGTH Price Code word Price Code word Price Code word Price Code word
  - cm.
  - 5.5 6.5 7.5 8.5 9 10.5 12 13.5 Stetheorbe Stethesis Stethese Stethor Stetafia Steteka Stetebole Steterm Stethesira Stethesra Stethorira Stetefiara Stetekara Stetebera Steterra Stetheorus Stethesirus Stethesus Stethorus Stetafiarus Stetekarus Steteberus Steterrus Stetheorco Stethesico Stethesco Stethorico Stetafiako Stetekaco Stetebeco Stetermico
  - 14
- p.14 - vue 16/76
- - -----------------! E. Krauss, 18 ET 20, Rue de Naples, PARIS I----------------------
  - KRAUSS-ZEISS TESSAR F/6.3. — Series Ilb
  - Interiors, Copying, Enlargements. Giving extreme sharpness, from center to edge.
  - Standard Mount N Sunk Mount R Helical Focussing Mount H Fitted to Compur Shutter C FOCAL
  - Price Code word Price Code word Price Code word Price Code word LENGTH
  - Tesso Tessun Tessiko Tessunbi Tesseux Tesseuxa Tessine Tessa tre Tessinq Tesquin Tessinqua Tessix Tessept Tessoct Tesseuf Tessera Tessonc Tessera Tesskara Tessinra Tessatrera Tesquera Tesquinra Testrora Testera Tesseptra e - Tessorus Tessurus Tessirus Tessunrus Tesserus Tesskarus Tessinrus Tessatrus Tesquerus Tesquinrus Testrorus Tesberus Tesseptrus Tessoco Tessunco Tessikoco Tessunbico Tesserco Tesskoco Tessaco Tessatreco) Testreco ( Testoco ) Tesmico ( Tesquico ) Teslaco ) Testurco Tesbeco Tessepco Tessoctco Tesseufco cm. 411 5.5 6.5 7.5 8.5 9 12 13.5 15 16.5 18 21 25 30 36 50 60
  - TESSAR F/6.3, Paired for Stereoscopic Work
  - Standard Mount N Sunk Mount R Helical Focussing Mount H Fitted to Compur Shutter C FOCAL
  - Price Code word Price Code word Price Code word Price Code word LENGTH
  - Stetessun Stetessiko Stetessu Stetesseux Steta Stetessine Stetessat S tesseux Stesskara S tessinra Stessat Stessunus Stessikus S tesserus Stessus Stesskarus Stessinrus Stessatus Stessunco Stessikco S tesserco Stessusco Stesskoco Stessinco S tessaco cm. 5.5 6.5 7.5 8.5 9 12 13.5
  - 15
- p.15 - vue 17/76
- - -----------------1 E. Krauss, 18 ET 20, Rue de Naples, PARIS *----------------------
  - KRAUSS-ZEISS DOUBLE PROTARS
  - O Z FOCAL LENGTHS Full aperture Diameter of clear aperture Recommended for plate size Diameter of sharp image circle with small stops MOUNTS
  - Component Combined focus Body (3) CAMERA EXTENSION
  - len Front ses Back Standard N Sunk R Helical focussing H
  - 1 cm. S cm. eries 18 cm. VII. 18 F/ — SIN 12.5 mm. 1GLE 17 cm. PROTI 12x15 cm. IR Lar 29 dscap I Ha III cm. e Lens 20.5 cm. es (1) 21.4 cm. 21.2
  - 2 — 22 22 12.5 21 13x18 36 IIAIII IV 25 26 25.9
  - 3 — 29 29 12.5 27 16x21 46 III IV 33 34.3 34.2
  - 4 — 35 35 12.5 33 21 x27 56 IV VIII 39.5 41.7 41.6
  - 5 — 41 41 12.5 39 24x30 66 VIII 46 — —
  - 6 — 48 48 12.5 44 28x34 77 VIII 54 — —
  - 7 — 59 59 12.5 55 30 x 40 94 X XII 66 — —
  - 8 — 69 69 12.5 64 34x45 110 XII 77 — —
  - 1 18 Serie 18 is VI 10.5 la. UN 6.3 VIVER: 17 SAL D 6.5x9 OUBL 17 E PRC I II3 TAR 10 (2) 11 10.7
  - 2 22 18 11.5 7 21 6.5x9 18 IP III 11 12 11.9
  - 3 29 18 13 7.7 27 8x10.5 20 III 12. 13.3 13.2
  - 4 22 22 13 6.3 21 8x 10.5 20 IPIIIIV 12.3 13.3 13.2
  - 5 29 22 14.5 7 27 9x12 21 III IV 13.8 15.1 15
  - 6 35 22 15.5 7.7 33 10x13 22 IV 14.4 16.6 16.5
  - 7 29 29 17 6.3 27 10x15 26 IIIIV 16 17.3 17.2
  - 8 35 29 18.5 7 33 12x16 26 IV VIII 17 19.2 19.1
  - 9 41 29 20 7.7 39 13x18 30 VIII 18 — —
  - 10 35 35 20.5 6.3 33 13x18 32 IV VIII 19 21.2 21.1
  - 11 41 35 22 7 39 13x21 34 VIII 20.5 — —
  - 12 48 35 23.5 7.7 44 16x21 37 VIII 21.5 — —
  - 13 41 41 24 6.3 39 16x21 37 VIII 22.5 — —
  - 14 48 41 26 7 44 18x24 40 VIII 23.5 — —
  - 15 59 41 28 7.7 55 18x24 44 X 25.5 — —
  - 16 48 48 28 6.3 44 18x24 44 VIII 26 — —
  - 17 59 48 31 7 55 18x24 48 X XII 28 — —
  - 18 69 48 33 7.7 64 21 x26 52 XII 30 — —
  - 19 59 59 34 6.3 55 21 x26 54 X 32 — —
  - 20 69 59 37 7 64 24x30 58 XII 34 — —
  - 22 69 69 40 6.3 64 24x30 63 XII 37 — —
  - (1) The Protar Lenses, used singly, should always be
  - (2) In the Double Protars the larger lens should always
  - (3) The bodies printed in heavy type are those cor-We supply these lenses in tubular mounts, as indicated
  - 16
- p.16 - vue 18/76
- - I E. Krauss, 18 ET 20, Rue DE Naples, Paris l —
  - KRAUSS-ZEISS DOUBLE PROTAR
  - Fitted to Compur Shutter C Standard Mount N Sunk Mount R Helical Focussing Mount H Fitted to Compur Shutter C Nos.
  - No. of Shutter No. of Body Camera extension Price Codeword Price Codeword
  - Price Codeword Price Codeword
  - cm. .1 -..
  - SINGLE PROTAR LENSES f or Landscape Work. Series VII
  - 0 I 21 Labour Labera Laberus Laberco 1
  - 1 IIa 25.6 Lac Lacra Lacrus Lacco 2
  - 1 III 33.7 Laine Lainra Lainrus Lainco 3
  - 2 IV 40.8 Lais Laisra Laisrus Laisco 4
  - 3 VIII 48.3 Lamproie — O Lamprus Lamco 5
  - 3 VIII 56.3 Lande — Landerus Landeco 6
  - 4 X 68.5 Larve — • Larvus Larveco 7
  - 5 XII 80 Lecture — Lecturus Lecturco 8
  - UNIVERSAL DOUBLE PROTAR. Series VII
  - 0 I 10.5 Liane Lianra Lianrus Lianco 1
  - 1 IIa 11.6 Liard Liardra Liardrus Liardco 2
  - 1 III 12.7 Libration Librara Librarus Libraco 3
  - 1 IIa 12.9 Licorne Licarra Licarrus Licarco 4
  - 1 III 14.5 Lie Liera Lierus Lieco 5
  - 2 IV 15.7 Lierre Libera Liberus Liberco 6
  - 1 III 16.7 Limace Limara Limarus Limaco 7
  - 2 IV 18.3 Limande Limandra Limandrus Limandeco 8
  - 3 VIII 20.3 Lin — — Linco 9
  - 2 IV 20.3 Lingot Lingotra Lingotrus Lingotco 10
  - 3 VIII 22.6 Lion — — Lionco 11
  - 3 VIII 23.8 Liqueur — — Liqueco 12
  - 3 VIII 24.8 Lis — — Lisco 13
  - 3 VIII 25.8 Liseron — — Liseroco 14
  - 4 X 28 Lit — — Liteco 15
  - 3 VIII 28.3 Literie — — Literico 16
  - 4 X 30.5 Litige — — Litigeco 17
  - 5 XII 33 Livre — — Livreco 18
  - 4 X 34.5 Locution — — Locuco 19
  - 5 XII 37 Loge — — Logeco 20
  - 5 XII 40 Lot — — Lotteco 22
  - placed at the back.
  - be placed in front.
  - responding to the extensions stated in the next three columns.
  - b y ordinary Roman figures, at the same prices.
  - 17
- p.17 - vue 19/76
- - E. Krauss, 18 et 20, RUE de Naples, Paris
  - CONVERTIBLE SETS OF ANASTIGMATS
  - By an appropriate choice of several, say three or four Single Protar Lenses VII, F/12.5 of different foci a Convertible Set may be made up, which with this restricted number of elements furnishes a much greater number of single or combined objectives of different focal lengths. This enables an operator to take any given object in the best manner from an artistic aspect by stepping as far back as his resources admit of and also to select that focal length by which the object can be attacked under the most favourable conditions as regards angle, size, and perspective.
  - A Convertible Set
  - Comprising............................... 12 3 4 lenses
  - Furnishes objectives of.................. 13 6 10 focal lengths.
  - Convertible Sets may be made up to suit all plate sizes and all purposes.
  - We append below three selected sets, which are in more frequent demand than any others and which have stood the test of many years, in consequence of which we have them always in stock.
  - Each Convertible Set comprises the following items :
  - (1) A body or shutter with mount;
  - (2) Three or four Single Protar Lenses Series VII;
  - (3) A sunshade, which in front takes the place of the front lens when the back lens only is employed;
  - (4) A flange for attaching the lens body to the lens panel;
  - (5) A lens cap;
  - (6) A Table of mechanical apertures corresponding to the relative apertures of the different lenses and their combinations.
  - Made up of Angle Most suitable plate size Plate
  - lens es of Com- subtend- covered
  - Series Series V11 bined ed by with Price
  - and Focus Focus the stated at full with with small
  - Number Front | Back plate aperture stop F/12.5 stop F/23 stops
  - cm. cm. cm. Degrees cm. cm. cm.
  - Convertible Set B for 5 x 4-in. plates, C III (Codeword : Lycee, — on Compur Shutter : Lyceco)
  - VII 3 — 29 29 24° — 16x21 24x30 26x36
  - 2 — 22 22 30° — 13x18 20x27 21 x28
  - 1 — 18 18 37° — 12x15 16x21 17x23
  - VII- 5 29 22 14.5 45° 9x12 11x15 12x16 14x19
  - 3 29 18 13 490 8x10.5 10x14 11x15 12x16
  - 2 22 18 11.5 55° 6.5x9 9x14 10x15 lOx 16
  - Convertible Set C for 7 1/2 X 5-in. plates, C IV (Codeword : Lynx, — on Compur Shutter : Lynxco)
  - VII 4 — 35 35 29° — 21 x27 29x34 31 x43
  - 3 — 29 29 350 — 16x21 24x30 26x36
  - 2 — 22 22 44° — 13x18 18x24 20x28
  - VIIs 8 35 29 18.5 52” 13x18 15x20 16x21 17x23
  - 6 35 22 15.5 60° 10x 13 12x15 13x 18 14x19
  - 5 29 22 14.5 64° 9x12 11x15 12x16 13x18
  - Convertible Set D for 9 x /-in. plate s, C VIII
  - (Codeword : Lyre, - - on Compur Shutter : Lyreco)
  - VII 6 — 48 48 28° — 29x34 34x44 47x57
  - 5 — 41 41 330 — 24x30 30x40 40x50
  - 4 — 35 35 380 — 21 x27 29x34 31 x43
  - 3 — 29 29 450 — 16x21 24x30 26x36
  - VII- 14 48 41 26 500 18x24 24x30 25x31 27x33
  - 12 48 35 23.5 54” 16x21 23x28 24x29 24x32
  - — 48 29 21 60” 13x20 15x21 17x23 18x24
  - 11 41 35 22 57” 13x21 15x23 19x25 21 x27
  - 9 41 29 20 62” 13x18 15x21 17x22 18x24
  - 8 35 29 18.5 67” 13x 18 15x20 16x21 17x23
  - As a completing supplement to the Set we recommend as a short focus lens a Wide Angle Protar of Series V, F/18 :
  - For plate size Protar V, F/18,/ = 5 X 4 in. 71/2x5in. 9 X 7 in. 8.5 cm. 11 cm, 14cm.
  - 18
- p.18 - vue 20/76
- - -----------------1 E. Krauss, 18 ET 20, Rue de Naples, Paris I----------------------
  - Series V
  - KRAUSS-ZEISS PROTARS F/18
  - The Protars of Series V are Wide Angle Lenses and have not their equals for photographing monumental architecture and interiors.
  - The full aperture is F/18, the angle embraced at this aperture being about 85° in the case of the shorter foci and 70 to 75° in the case ot the long foci. The largest useful angle obtainable with small stops is 110° for the short foci (up to No. 3), while for the long foci it is 104°. Nos. 8, 9 and 10, finally, are corrected for an angle of 85° and are essentially copying lenses.
  - Generally speaking, the shortest focus possible should be taken for interiors, in order to cover the plate with a small stop, in view of local restrictions, the large angle, and the small amount of decentration required.
  - In the case of monumental architecture taken outdoors the operator stands further back and the necessity of placing the lens out of centre becomes more imperative. 1 Hence that focal length should be taken which will cover the plate with a stop F/18 or F/20, so that a rather longer focus will be required.
  - At full aperture F/18 the Protars of Series V are adapted for large groups, for photographing interiors by artificial light, for panoramic views, and for photographing machinery and such like.
  - Nos. 8 to 10 are specially corrected for copying work and have for this reason a diminished secondary spectrum.
  - Nos. 2 to 10 can be mounted on Compur shutters.
  - Nos. Focus Diameter of clear aperture Most suitable size of plate with stop Diameter of the sharp image circle with small stops STANDARD MOUNT N
  - F/18 F/36 F/45 Body Camera extension Price Codeword
  - angle 104°
  - cm. mm. cm. cm. cm. cm. mm.
  - 0 4 3.5 4.5 x 6 6x 8 — 10 00 37 Jury
  - 00 6 5 6 x 8 8x10 — 14 00 58 Ja
  - 1 8.5 8 9 x12 12x15 13x18 22 I 81 Jabot
  - 2 11 10.5 12 x 15 13x18 16x23 28 I 106 Jacinthe
  - 3 14 12.5 13 x 18 16x21 23 x28 36 II 135 Jade
  - 4 18 17.5 16 x 21 21x26 27x38 46 II 175 Jais
  - 5 21 20 21 x 26 24x30 30x45 54 II 205 Jalon
  - 6 27 25 24 x30 26x35 39x55 68 IVa 256 Jambe
  - 7 32 30 26 x35 30x40 47x66 81 IVa 298 Jardin
  - 7 bis 39 37.5 30 x 40 40x50 60x80 100 VII 370 J a let
  - angle 85°
  - 8 46 26 30 x 40 40x50 54x65 84 III 432 Jarret
  - 9 63 35 40 x50 50x70 62x88 116 VI 600 Jeton
  - 10 95 54 50 x 60 80x90 100x140 173 X 900 Joaillier
  - 19
- p.19 - vue 21/76
- - E. Krauss, 18 ET 20, Rue de Naples, PARIS
  - KRAUSS-TRIANAR F/3 to F/4.5 and F/6.3
  - No. Focus Body Lengths of special Bodies Diameter of clear aperture Most suitable size of plate covered Circle sharply covered with small stops CAMERA EXTENSION Compur Shutter
  - Standard Mount N Sunk Mount R Fo-cussing Mount H On Com-pur Shutter C No Body
  - 1 2 3 4 5 11 12 13 14 15 16 17 18 19 20 21 22 23 31 32 33 34 35 36 37 38 39 40 41 42 43 cm. 3.5 4 5 7.5 10 4 5.5 6.5 7.5 8.5 9 10.5 12 13.5 15 16.5 18 21 4 5.5 6.5 7.5 8.5 9 10.5 12 13.5 15 16.5 18 21 0 I I IIa IV IV-IVe VIa VI VII Ile HR III IV V mm. Trian 24 24 24.5 24 mm. Trianan 12 13.5 16.5 25 33.5 ar F.4. 9 12.5 14.5 16.7 19 19.5 23.5 24.8 30 33.5 37 40 47 Tria 6.5 9 10.5 12 13.5 14.5 17 19 22 24 26.5 29 34 cm. F/3 for ( 1.2 x 1.8 1.4 x 2 1.8 x 2.4 3x3 4.5x 4.5 5 for ultr 2x2 3x3 4x4 4.5 x 6 5 x 6 5x71 5x8 6x9 7 x 10 9 X12 9 x14 10 x 15 13 x18 nar F/6.3 2.5 x 2.5 4x4 4x5 4.5 x 6 1 6x6| 6 x 6.5 5x8 6.5x 9 8 x 10.5 9 x 12 9 x 14 10 x 15 13 X18 cm. Cinema a-rapid With are mak in t for rap With are mak in t mm. tograp 24.4 29.2 38.6 59.7 75.5 instar horter : made t( ers, who he mou 131.9 147.9 162.1 178.4 208.3 >id sna shorter made t ers, wh he mou 132 147.9 165.3 176.5 207.8 mm. lie Wo 35.5 46.9 69.6 itaneou I ocal len ) order ise speci nts. 181 208 231 pshots 1 ocal len o order ose spec nts. 178.3 231.8 mm. rk 29.9 36.2 45.6 68.2 s work rianar gths tha only in al requi 178 205.4 229 ’rianar gths the only ir ial requ 177.3 mm. 29.5 33.5 43.2 65.5 88.4 S n 13.5 quanti rements 141.1 162.4 172.4 189.5 221.4 s in 13.5 quanti rements 140.4 157.6 173.1 189.4 221.5 00 0 0 1 2 :m. (5 1 ty for c are eml 1 2 2 2 3 cm. (5 ty for are em OL OL 1 2 2 00 I I Ila IV /2 in.) amera odied III IVA VIa VI VII /2 in.) camera bodied IPsp Isp III IV IV
  - 20
- p.20 - vue 22/76
- - 1 E. Krauss, 18 ET 20, Rue de Naples, Paris I.
  - KRAUSS TRIANAR F/3 to F/4.5 and F/6.3
  - Focus Suitable for Plate Size St M Price andard ount N Codeword Sunl Price Mount R Codeword Helical M Price Focussing ount H Codeword On Shi Price Compur itter C Codeword
  - cm. 3.5 4 5 7.5 10 4 5.5 6.5 7.5 8.5 9 10.5 12 13.5 15 16.5 18 21 4 " 5.5 6.5 7.5 8.5 9 10.5 12 13.5 | 15 | 16.5 18 21 cm. 1.2 x 1.8 1.4 x 2 1.8 x 2.4 3x3 4.5x 4.5 Tri 2x2 3x3 4x4 4.5 x 6 5x6 5x7 5x8 6x9 7 X10 9 x12 9 X14 10 x15 13 xl8 2.5x 2.5 4x4 4x5 4.5x 6 6x6 6 x 6.5 5x8 6.5 x 9 8 x 10.5 9 x 12 9 X14 10 x 15 13 X18 Tria anar F nar F/3 ft Triama Trianon Triast Triape Tria /4.5 for ul Tribut Trifa Trigem Trigar Trigus Triller Trillus Trim Trina Trinem Trinon Trinite Tripe Trianar Trisar Trisis Trisup Trista Trister Tristek Trispe Trispir Triton Tritte Trittel Trive Trix or Cine tra-rai F/6.3 f matograp Triastra Triapra Triara id instant Trigera Trigarra Trigusra Trillera Trillusra Trimra Trinara Trinemra Trinonra Triniter a Tripera ar snapshi Tristara Tristerra Tristekar Trispera Trispirra Tritonar Trittar Trittelar Triver a Trixar h Work taneous ats Triamus Trianonus Triastus Triapus Triarus work Trifus Trigemus Trigarus Trigusus Trillerus Trillusus Trimus Trinasus Trinemus Trinonus Trinitus Tripus Trisipus Tristus Tristerus Tristekus Trispus Trispirus Tritonus Trittus Trittelus Trivetus Trixus Triamaco Trianoco Triasteo Triapco Triaco Trigeco Trigarco Trigusco Trilleco Trillusco Trimco Trinaco Trinemco Trinonco Triniteco Tripeco Trisico Tristaco Tristerco Tristekko Trispeco Trispirco Tritoco Tritteco Trittelco Triveco Trixco
  - * * *
- p.21 - vue 23/76
- - -----------------I E. Krauss, 18 ET 20, RUE de Naples, Paris
  - Copying Lenses for Process Work
  - The illustration of reading matter has grown to such an extent that there is scarcely a printing establishment of any magnitude to which there is not attached a special studio for making reproductions of a more or less important character. The ultimate success of photo-mechanical operations depends in a
  - very great measure upon the quality of the lenses employed.
  - All our objectives, being highly corrected, are available for photographic reproductions.
  - The long focus lenses of the Tessars and the Protars of Series V are particularly well adapted for photo-engraving in the style of line drawings and mezzotint.
  - For photographic reproductions in selective colours and for photo-mechanical three-colour and polychrome printing it becomes indispensible to employ the Apochromatic Tessars of Series VIII.
  - In these lenses the secondary chromatic aberrations are eliminated and hence they will yield three, four or more component colour negatives for superimposed printing. All these negatives are of a remark-able degree of crispness, in consequence of which these lenses are ideally adapted for reproduction work, in black and white as well as in colours.
  - Process Lenses for Line Work and Mezzotint, Photo Engraving and Colour Work.
  - Series Nos. Relative aperture Focus Body Clear aperture Suitable Size of plate for Reproduction Stop to be used Price (2) Codeword
  - full size reduced 2:1
  - F/ cm. mm. cm. cm.
  - FOR MONOCHROME WORK
  - 5 6.3 15 III 24 9x12 9x 12 Tessinq
  - Tessar 6 6.3 21 V 35 13x18 12x16 Tessix
  - 7 6.3 25 VII 42 15x21 13x18 Tessept
  - IIb 8 6.3 30 Xa 51 18x24 14x20 Tessoct
  - 9 6.3 36 XIIa 61 24x30 16x21 Tesseuf
  - (1) 10 6.3 50 XIV 82 30x40 24x30 Tessem
  - 11 6.3 60 XVI 94 40x50 27 x 33 Tessonc
  - FOR MONOCHROME AND POLYCHROME WORK
  - Protar 7 18 32 IVa 30 24x 30 18x 24 F/18 Jardin
  - 7 bis 18 39 VII 37.5 26x 35 20 x 25 Half Jalet
  - V 8 18 46 III 26 30x 40 24 x 30 tones Jarret
  - 9 18 63 VI 35 40x 50 30 x 40 F/32 Jeton
  - (I) 10 18 95 X 54 50x 60 40 x 50 Line Joaillier
  - 0 9 32 VI 35 24x 30 18x 24 F/12.5 Tessapipo
  - 1 10 46 Xa 51 40x 50 30 x 40 /Half tones Tessapo
  - Apo- 2 10 64 XIIIb 71 50x 60 40 x 50 ( F/18 Tessapeux
  - chroma- 3 10.5 84 XVb 82 70x 80 50 x 60 ) Line Tessaproix
  - tic 1 4 12.5 117 XVI 94 80x 90 60 x 70 F/15 Tessapac
  - Tessar 4 bis 15 150 XVI 100 90x 120 70 x 80 Half tones Tessapulu
  - VIII 5 15 180 — 120 120x 150 90x 100 )F/30 Line Tessapoin
  - (1) As these series serve equally for general work of any other kind (see pages 12 and 19), the stated covering powers are for distant objects.
  - (2) In standard mounts N with iris-diaphragms.
  - 22
- p.22 - vue 24/76
- - ---------I E. Krauss, 18 ET 20, RUE de Naples, PARIS I-----------------------
  - PROCESS LENSES (Continued)
  - For reproductions in colours it is necessary to employ a square stop which can be rotated within its own plane at different angles up to 45°. Our objectives are therefore so arranged that they can, in addition to the iris-diaphragm, be fitted with a revolving box with sliding diaphragms. This modification, which is subject to an additional charge, comprises a set of five square diaphragms, the circumscribed circles to which, unless otherwise stated, conform to the relative apertures.
  - F/16 F/23 F/32 F/45 F/64.
  - If desired, we are prepared to supply diaphragms of special forms and apertures.
  - Since the distribution of light over the entire image area requires to be as uniform as pos-sible, the use of lenses operating at a very short range, or so-called short-focus lenses, are to be avoided.
  - The use of screens for autotype and colour printing forbids the use of angles exceeding 30°. Hence for reproductipn in full size or thereabouts it becomes necessary to employ objectives the focal distance of which is at least equal to the diagonal of the surface which is to be covered.
  - When the reduction is less than 5 : 4 it will be necessary to work with a longer focus.
  - Accessories for Process Lenses
  - For Objective Supplementary Fitting for Iris-diaphragm and Sliding Diaphragm Filter Price Troughs Codeword Prisms1 and Mirrors2 REVOLVING LENS FLANGES
  - To the Objective To the Prism
  - Price Codeword Price Codeword Price Codeword
  - Price Codeword
  - Tes-sarIIb 15 cm. 21 — 25 -30 — 36 -50 — 60 - I l l l l l I I II I I I Printo1 Primera1 Primus1 Prigato1 Mirac2 Miramo2 Mirecto2 Rolac Rolade Rolago Rolaff Rolaha Rolaker Ro la las Roprac Roprade Roprago Ropraff Ropraha Ropraker Ropralus
  - Pro-tar V 32 cm. 39 -46 -63 — 95 - — Cubi Cubalo Cubem Cubas Cabell Prigossol Prigam1 Prigalto1 Prigol1 Prigittel Rolama Rolampo Rolamtos Rolamesse Rolamys Roprama Roprampo Ropramtos Ropramesse Ropramys
  - Apo-Tes- sar 32 cm. 46 -64 — 84 — 117 — ISO-180 - Valaam Valatta Valus Valim Valorb Valonto Valorus Cabedo Cuboma Cubifi Cubolto Cubista Cubiri Cubosti Prilap1 Prilerol Mirima2 Miroppo2 Mirulto2 Mirugus2 Miristo2 Rolanca Roland Rolaneff Rolangar Rolangiso Rolapp Rolapico Ropranca Roprand Ropraneff Roprangar Roprangiso Roprapp Roprapico
  - 23
- p.23 - vue 25/76
- - E. Krauss, 18 ET 20, Rue de Naples, Paris
  - PRISMS AND MIRRORS
  - Prisms or Mirrors are needed in order to obtain direct photographically reversed negatives, which are indispensible in the production of electros for rapid press work, as well as for very exacting operations, such as cartographic printing, and for preparing the component colour blocks for photo-mechanical printing in three or more colours.
  - The prisms should satisfy the following requirements :
  - It should be made of a glass having an appropriate index of refraction and it should also be perfectly homogeneous throughout, without a crack or flaw, without striae and free from strain.
  - Its three faces should be optically plane and therefore be without any converging or diverging effect.
  - The faces of incidence and emergence should be exactly at right angles and should include an angle of 45° with the hypotenuse surface. All our prisms fulfil these conditions.
  - When it comes to very large dimensions we replace the prisms by mirrors, since very large blocks of prism glass of a perfectly homogeneous quality are not only very difficult to obtain, but very costly if they are to fulfil the above conditions.
  - The mirrors are formed by the optically plane and polished surface of a block of a metal of a special composition, the polish of which resists
  - in a high degree the action of the sulphurous contamination of the air of large towns.
  - The mount of the prisms and mirrors screws upon the sunshade of our objectives.
  - REVOLVING FLANGE COLLAR
  - For the purpose of accurately setting the hypotenuse mirror surface of the prism to a vertical plane it is well to have the lens mount fitted with a revolving collar, which ensures an exactly central motion and has a clamping screw. With the aid of this revolving collar the prism or the mirror may be accurately centred with respect to the original and also fixed in any desired position.
  - FILTER TROUGHS
  - For Spectroscopic Colour Selection.
  - For picking out a certain spectrum colour a trough containing the appropriate selectively coloured fluid is attached to the hood of the lens mount.
  - These troughs consist of two plane
  - =
  - 1
  - de
  - ol
  - -O
  - and parallel glass discs held a short distance apart by a ring of the same material. The trough is provided with two round openings which can be closed by rubber stoppers and is contained within a brass mount which fits the lens hood and is held in position by friction.
  - In order that the filter may not in any way vitiate the quality of the image the glass discs require to be worked with the same degree of precision as the lenses which compose the objective. This accounts for the somewhat high price of this adjunct.
  - Plate glass troughs can naturally be sold at a much lower price, but they are useless for delicate work, as they injuriously affect the defining qualities of the objective.
  - We supply our prisms and filter troughs centred with respect to the axis of the objective. In all cases where either is ordered for use with an existing lens the latter should be sent to us for adaptation, as otherwise we cannot answer for a proper central fitting.
  - Process work invariably necessitates the installation of a special studio and a comparatively complicated equipment. We would therefore suggest that those about to instal process apparatus should address our technical experts, who will supply all information that may be desired.
  - 24
- p.24 - vue 26/76
- - E. Krauss, 18 ET 20, Rue de Naples, Paris
  - TELEPHOTO LENSES
  - The telephoto objective may be regarded as a set of convertible lenses of long foci which can be varied at pleasure and which require only a short camera extension for a long resultant focus.
  - The telephoto objective combination comprises the following components :
  - (1) A positive element of focal length fi, formed by a highly corrected anastigmatic lens, viz.
  - A Tessar Ic, F/3.5 or F/4.5, or a Tessar IIb, F/6.3, or a
  - Trianar F/4.5 or F/6.3.
  - 1
  - 3 09
  - length f2 in the form af a negative 1 ===== magnifying and equally well corrected lens. Experience has shown that the focal f2 should not, if possible, be shorter than about half the positive focal length /1.
  - (3) A telephoto tube, which establishes the union of the positive and negative elements. The combination requires to be perfectly centred. The fixed telephoto tube is intended for cameras with fixed camera extension. It gives an invariable magnification. The focal adjustment for varying distances is effected with the aid of the helical mount of the objective.
  - The extensible tele-tube admits of the combination being set for various magnifications. The magnification is governed by the camera extension. The least magnification of the tele objective is not generally less than 2 X.
  - Cost of mounting and adjusting a telephoto combination...........
  - AMPLIFYING MEMBERS for TELEPHOTO OBJECTIVES (Negative elements)
  - No. Diameter of Lens Focal Distance e Available for use with Tube No. Price Codeword
  - mm. cm.
  - 1 15 3 I et III Negaprimus
  - 2 24 4.5 I et III Negasecundus
  - 3 30 6 I-F III Negatertius
  - 4 37 7.5 I- II III Negaquartus
  - 5 56 10 II et IV Negaquintus
  - | 6 68 12.5 II et IV 1 Negasixtus
  - 25
- p.25 - vue 27/76
- - -================ E. KRAUSS, 18 ET 20, RUE DE NAPLES, PARIS ---------------
  - TELEPHOTO TUBES
  - No. of Tube Adapted for Diameter of largest screw flange Corresponding to Body N. Tube extension Price Codeword
  - Objective Negative lens up to f
  - of A Type of Mount
  - cm. (1) cm. mm. mm.
  - Tele Tubes for Cameras with Fixed Extension
  - I 12 a 18 H 6 50 IV 0 Tubun
  - Ia 13 a 21 H 7.5 65 VII 0 Tubis
  - II 18 a 25 H 12.5 65 VII 0 Tudeux
  - Tele Tubes for Multiple Magnifications
  - N
  - III 10 a 21 R 7.5 65 VII 22 Tutrois
  - IV 16 a 30 c 12.5 75 X 30 Tuquatre
  - (1) See table of mounts, p. 11.
  - We are prepared to make up Telephoto Objectives for special purposes as well as for ordinary requirements. We shall be pleased to submit, free of charge, all particulars that may be needed respecting any telephoto objebtive to suit the nature of the proposed work.
  - The following particulars should be supplied by the enquirer :
  - (1) What are the type, plate size, longest and shortest camera extension?
  - Does the lens panel attach by a slide or by clamps?
  - What is the diameter of the hole under the panel?
  - (2) Is an objective available which you propose to use as the positive element? If so, state its series, aperture, focus, diameter of flange screw?
  - (3) What is the proposed work?
  - (4) What is the required magnification?
  - (5) Is the tele combination required to give one or several magnifications?
  - (6) What is the plate size which you desire to cover?
  - (7) What are the nearest and farthest distance at which you propose to operate?
  - (8) What is the proposed reduction of an object?
  - 26
- p.26 - vue 28/76
- - —— -------------1 E. Krauss, 18 ET 20, Rue de Naples, Paris '-----------------------
  - KRAUSS-ZEISS TELE-TESSAR
  - The Tele Tessar is a telephoto combination of a fixed focal length and with a large relative aperture having its second principal point in front of the camera. With the telephoto objectives it shares the advantage of enabling one to employ a focal length which is considerably in excess of the camera extension.
  - It is specially designed for use on hand cameras, where it takes the place of the standard lens of shorter focus. In view of its large aperture of F/6.3 it is adapted for snapshots and for taking moving objects much in the same way as ordinary lenses of similar relative aperture.
  - It is designed for portraits, landscapes, objects and scenes at some distance, animate or otherwise. Its diminished sharpness and its smaller angle renders it well adapted for obtaining artistic effects.
  - The objective is focussed, to suit different distances, by setting the camera extension.
  - Resultant Focal Length cm. 18 25 32 40
  - Suitable size of plate cm. 6.5x9 9x12 10x 15 13x18
  - Diameter of the sharp image ( at infinity cm. 13.5 18.5 24 30
  - obtained with small stops ' at 3 yds Relative size of the images obtained as compared ) cm. 14.5 20.5 27 35
  - with those furnished by the standard lens cor- ( responding to the camera extension ) 1.5 x 1.66X 1.8x 1.9x
  - Standard body II IV VI IX
  - Diameter of the flange screw mm. 40 50 61 70
  - Diameter of hole to be cut for the flange. . mm. 43 53.5 64 79
  - Outside diameter of the lens flange mm. 57 69 82 97
  - ( Length of i projecting outside camera. mm 37 53 74 96
  - Objective ( — inside camera... mm’ 20 26 27 29
  - Standard < Camera extension ( for infinity approx. mm 105 145 180 220
  - Mount / from flange to fo- ) for about 3 yds.... mm* 115 165 220 280
  - N cussing screen ' Codeword mm Tebac Tebed Tebif Tebog
  - ( Length of i projecting outside camera. . Objective/ — inside camera. - - mm 27 35 45 —
  - mm 30 45 56 —
  - Sunk Camera extension i for infinity, approx. mm 115 165 210 —
  - Mount /from flange to fo- ( for about 3 yds.... mm 125 185 250 —
  - R \ cussing screen Codeword mm. lecah Tecek Tecil
  - ( Length of ) projecting outside camera.. mm. 31 40 63 71
  - On Objective! — inside camera... mm. 26 39 38 54
  - Compur Camera extension \ for infinity, approx. mm. 110 158 191 245
  - Shutter I from flange to fo- ( for about 3 yds.... mm. 120 178 231 305
  - C i cussing screen.. . Codeword Tedan Tedep Tedir Tedos
  - In the event of the diameter of the flange of the objective and that of the Tele Tessar which are to be used alternately on the camera differing in size, the larger of the two flanges should be permanently fixed to the front of the camera. An intermediate flange should then be employed to attach the smaller lens flange of the two.
  - 27
- p.27 - vue 29/76
- - E. Krauss, 18 ET 20, Rue de Naples, PARIS I----------------------
  - KRAUSS TELAR LENSES
  - When one transforms into a telephoto lens an objective of focal length 1, this focal length is at least trebled and becomes 3. The Telar Lenses have been originated to fill this wide gap between 1 and 3 and give focal lengths of 1 1/3, 1 2/3 and 2 times that of the objective employed by itself.
  - They do away with the necessity of going closer up to the object and thereby avoid the
  - distorted or exaggerated perspective which results from too close a stand-point and which greatly mars the aesthetic value of the picture. They tone down the harshness of the outlines and impart to portraits and landscapes an artistic atmosphere.
  - They take advantage of the camera extension, which becomes longer at the same rate as the focus. The angle embraced by the
  - lens diminishes in the same proportions.
  - To ensure the same pictorial content one can recede to a distance which is 1 1/3, 1 2/3 or
  - 2 times greater than that between the object and the unsupplemented objective and in this way
  - greatly improve the perspective of the whole.
  - Focus of the objective alone 12 13.5 15 16.5 18 21 cm.
  - Focal length obtained ( 1/3 .. 15 18 20 22 24 28 cm.
  - by the addition 2/3.. 19 22.5 25 27.5 30 35 cm.
  - of a “ Telar ” Lens. ( 3/3.. 22.5 27 30 33 36 42 cm.
  - The " Telar ” Lenses, though specially computed for our objectives can also be attached to objectives of any other make. They are centrally set in ring mounts, like our colour screens, and screw upon the hoods of our objectives.
  - For objectives in Mounts Nos.. IIa III IV V VI VII
  - The diameter of the “ Telar
  - Lens is.......................... 32 36.5 42 47 51 58 mm.
  - Price..........................
  - When ordering a Telar Lens specify the objective, its focal length, its factory number, the nature of the mount (N. R. H. or C.) and camera extension, as well as the focal extension desired (1/3, 2/3 or 3/3).
  - 28
- p.28 - vue 30/76
- - ---------------1 E. Krauss, 18 ET 20, Rue de Naples, Paris b------------------
  - COLOUR SCREENS
  - For the correct rendering of colour values we make colour screens of optically worked glass plates with strictly plane and parallel faces. Being thus made, they do not exercice any detrimental effect upon the course of the rays and do not detract in the slightest degree from the
  - optical qualities of the lens. They can be employed for all manner of work, no matter how fine and exacting.
  - The material, whether colourless or coloured in the mass, is free from strains and flaws. The plates are ground and polished with the same precision as the photographic lenses themselves.
  - The selective effect obtained with the new optical glass is superior to that realisable with the ordinary coloured glass. It is equal to that resulting from the use of gelatine or other emulsions coloured with anilin dyes. These colour screens are absolutely permanent, unlike those made of gelatine or coloured emulsions. Aniline dyes are all sensitive to light, which gradually causes them to fade and to lose their selective properties sooner or later.
  - Our colour screens are set in metallic ring mounts and screw upon the lens hood.
  - We stock regularly the following screens :
  - Nature of photographic plate Screen
  - Orthochromatic plates New optical glass coloured in the mass
  - Ordinary plates Ordinary coloured glass
  - Lumiere autochrome plates Lumiere emulsion between two optically worked colourless glass plates
  - Slowing coefficient (1) and when used
  - \ Portraits, general work, landscapes 5 X without snow, instantaneous ' seascapes.
  - ( Subjects containing reddish tints,
  - 10 X 3 landscapes with snow, mount-( ains, glaciers, clouds.
  - 5 X General purposes, landscapes.
  - 10 X Seascapes, landscapes.
  - 15 X Snow, glaciers.
  - These are the best colour screens for colour photography on auto-chrome plates.
  - When ordering, state the inscription on the lens mount, the nature of the mount (N. H. R. or C.) and the outside diameter of the tube which receives the ring mount (see p. 11, table of our lens mounts).
  - We supply also, to order, all kinds of selective colour screens.
  - (1) The coefficients are approximate only, for they depend not only on the region of the spectrum which they transmit but also on the colour sensitivity of the plate, and it should not be overlooked that this varies with every fresh emulsion and with the nature of the light which the object receives and radiates.
  - 29
  - * % *
- p.29 - vue 31/76
- - - ...... I E. Krauss, 18 ET 20, Rue de NAPLES, PARIS I —
  - KRAUSS APODISTORTIC MAGNIFIERS
  - The distinctive features of these magnifiers are their bright field of view, their perfect achromatism, their absolutely flat field and the complete absence of distortion at the edges no less than at the centre. All these qualities of our apodistortic magnifiers are attained in the highest degree by the use of new optical glass material and by very exacting calculations. The working distance of these magnifiers is comparatively great. In fact, they are the best magnifiers in existence.
  - These magnifiers are supplied.
  - ‘ (1) In focussing mounts of black lacquered brass. This mount can be extended and shortened by a double-threaded Archimedian screw, whilst a locking collar serves to maintain the adjustment when
  - made.
  - To use the magnifiers it should be placed with its base against the focussing screen or the negative. One side of the lens tube may be cut down at an angle of 45°, so that the magnifier may be inclined and its axis placed in the direction of the rays when the marginal field of a wide angle lens is to be examined.
  - (2) In folding mount, for carrying the lens in the pocket, in nickeled brass, in deer skin snap case.
  - Mount No. Purpose Diameter mm. Focal Lentgh mm. Magnification Diameter of field of view mm. Free working distance mm. Price Codeword
  - 1 Portraits 27 42 4 38 48 Benu
  - Focuss- 1 2 Industrial photo-
  - ing graphs 22 33 6 32 34 Bedeux
  - Mount 3 Photo engraving.... 11 20 10 19 21 Bedois
  - 4 Botany 27 42 4 46 48 Apipo
  - 5 Entomology 22 33 6 35 34 Apono
  - Folding 6 Dermatology 11 20 10 20 21 Apodo
  - Mount 7 Histology 7 10 20 8 10 Apotois
  - KRAUSS DIQPTAT MAGNIFIER FOR CINEMATOGRAPH CAMERA WORK
  - The Krauss Dioptat Magnifier has been devised for the purpose of focussing cinematograph camera lenses, in that it admits of the eye being placed some distance (about 27 cm. or 11 inches) from the film. This is necessary as the film taking cinematograph cameras do not admit of the eye being placed sufficiently near to the film to use for this purpose a focussing magnifier of the usual type.
  - The Krauss Dioptat Magnifier, having perfect optical correction, gives a sharply defined view of the whole picture (25 X 19 mm.) magnified 5 times, and, which is particularly important, shows the picture erected and reversed into its natural state.
  - Magnification : 5 X; Length, 12 cm.; free working distance, 15 cm. Codeword : Dioptat.
  - 30
- p.30 - vue 32/76
- - -----------------i E. Krauss, 18 et 20, RUE de Naples, PARIS 1
  - COMPUR AND COMPOUND SHUTTERS
  - These shutters, which are now universally known, are the best and the most extensively used throughout the world. They function with absolute regularity. They are made in all sizes with iris openings from 15 to 65 mm. and can be fitted to small and large lenses.
  - They can be mounted on all cameras of quality.
  - They are supplied with flexible wire release.
  - Description Diameter of Barrel
  - C 2 o 6 c Case, incl. V 8.0 8 £ 2 Greatest — Price Code-wor 1
  - No. Body S ( bo out- fitt- 6 C € speed
  - 0 o • side ings 00B CO Co 3 2 •
  - C A E 0
  - mm. mm. mm. mm. mm. mm. mm. mm. sec. gr. ii
  - Compur Shutter
  - 00 0a — 15 44 51 22.5 11.5 18 1/2 1/300 46 Compa
  - 01 I — 22 57 69 30 16 25 2/3 1/250 80 Compala
  - ON Ib — 22 57 69 32.7 18.5 27.4 1/2 1/250 80 Compen
  - OL Ibsp — 22 57 69 32.7 18.5 28.8 2/3 1/250 80 Compelar
  - IN IIa — 27 66 77 35 20 30.2 2/3 1/200 105 Compun
  - IIII III — 27 66 77 40 23 35 2/3 1/200 115 Computre
  - 2 IV1 IV — 30.5 78 90 45 33 40.7 2/3 1/150 170 Compde
  - 2 IV2 IVa — 35 78 90 45 23 40.7 2/3 1/150 160 Compdela
  - 2 V V — 35 78 90 50 35 45 2/3 1/150 190 Compdeci
  - 2 VI VI — 35 78 90 55 40 49 2/3 1/150 190 Compdeffa
  - 2 VI® Via — 35 78 90 55 30 49 2/3 1/150 180 Compdega
  - Compound Shutter
  - 3 VII VII — 40 87 99 61 35 56.1 2/3 1/100 215 Comptre
  - 3 VIII VIII — 40 87 99 61 55 56.1 2/3 1/100 235 Comptreoct
  - 4 Xa Xa — 52 106 121.5 75 45 67 2/3 1/75 365 Compqua
  - 5 XII XII — 64.5 125 137 90 74 82.5 2/3 1/50 550 Compcin
  - 5 XII XIIa — 64.5 125 137 90 55 82.5 2/3 1/50 515 Compcissa
  - STEREOSCOPIC SHUTTERS
  - 00 0a 63 15 107x44 109x50 23 16.6 19.2 1/250 105 Compsta
  - ON Ib 65 22 123x57 124x64 33 18.5 26.9 1/150 165 Compsteno
  - ON Ib 75 22 132x57 139x62 33 18.5 26.9 1/150 180 Competsp
  - OL Ibsp 65 22 123x57 124x64 33 18.5 27.5 1/150 160 Compstolo
  - OL Ibsp 75 22 132x57 134x64 33 18.5 27.5 1/150 173 Compstort
  - 1 II II 65 27 131 x66 133x75 34 21.5 30.5 1/150 205 Compstulg
  - IN IIa 75 24 139x64 148x68 35 20 29.3 1/150 230 Compstupp
  - 1 III III 85 24 149x64 151 x72 40.5 23 34 1/150 240 Compstich
  - 2 V V 85 34 161 x75 166x84 48 35 44 1/150 355 Compstillo
  - 31
- p.31 - vue 33/76
- - 3 E. Krauss, 18 ET 20, RUE de Naples, PARIS
  - ROLLER BLIND SHUTTERS
  - This shutter, which is of the straight slit type, whilst it does not give such a wide opening as shutters which are mounted at the optical centre, is nevertheless excellent for being arranged in front of or behind the lens.
  - It gives at pleasure time and instantaneous exposures down to 1/15 to 1/75 second by increasing or lessening the spring tension, as shown on a graduated dial. The shutter is fitted with finger and pneumatic releases.
  - This shutter is best adapted for lenses which are too large to be fitted with a Compur shutter.
  - Number 1 2 3 4 5 6 7 8 9
  - Diameter mm. Before-lens type for Body No Behind-lens type for Body No Price Codeword 41 III II 45 IV III 55 V-VI IV-V 65 VII-IX VI-VII 80 X-XI IX-X 90 XII XI 100 XIII XII 115 XIV-XV XIII-XIV 127 XVI XV
  - Aba Ace Adi Aef Afo Agu A by Aik Alma
  - IBSO, VARIO AND PRONTO CENTRAL SHUTTERS
  - In order to still further reduce the prices of the “ Trianar ” lenses mounted on shutters we list for the first time the three well designed and well made metal shutters specified below.
  - *7
  - The " Ibso ” Shutter, with metal case, is automatic in its action and has a sector with three blades . Exposures can be given in single or double time and instantaneous exposures of 1, 1/2, 1/5, 1/10, 1/25, 1/50 and 1/100 second. The shutter has an iris-diaphragm and is fitted with finger and flexible wire release.
  - The " Vario ” and “ Pronto ” Shutters with metal case and automatic action, have sectors with two blades. Exposure can be given in single and double time and instantaneous exposures of 1/25, 1/50 and 1/100 second. The shutter has an iris-diaphragm and is fitted with finger and flexible wire release.
  - “ Ibso “ Vario “Pronto ”
  - No
  - 0 I II 0 I 00
  - mm. mm. mm. mm. mm. mm.
  - Iris opening Outside diameter of of shutter Diameter of the barrel screw Length of barrel These shutters can be fitted with the following Trianar Lenses only Price.. Codeword 20 56 27.5 18.8 ( 10.5 F/6.3 12 ( 13.5 F/4.8 { 10.5 Ybo 21.8 60 31.3 21.5 F/4.5 f = 10,5 F/4.7/=12 Ybun 27 67 35 5 24 F/4.5 /=13,5 Ybde 18 55 26.3 18.5 F/6.3 f—10,5-12 F/6.8 f-13,5 Varo 21.8 60 31.3 21.5 F/4.7 1=12 Varun 11.8 43 18.4 13.3 F/5 1-7 Pronto
  - 32
- p.32 - vue 34/76
- - L-===-=-==========E. KRAUSS, 18 ET 20, RUE DE NAPLES, PARIS --------
  - PART 11
  - PHOTOGRAPHIC CAMERAS
  - A good lens cannot be expected to give the results of which it is capable unless it is attached to a photographic camera the design and workmanship of which corresponds with the relative aperture of the lens. Persuaded of the undeniable truth of this maxim, we present to our readers a series of complete cameras equipped with our lenses and of the highest quality of workmanship.
  - All these cameras are carefully overhauled in our testing room before delivery, but it will be readily conceded that we cannot be held responsible for cameras which are not of our own make and that in the event of an apparatus proving defective all we can do will be to transmit to the maker the complaints of the purchaser.
  - The very complete range of cameras here described should satisfy all general requirements. Nevertheless we shall be pleased to assist enquirers acquainting us with their wishes by recommending one of the cameras listed in our catalogue or by pointing out an apparatus which we regard as the one best adapted for their special needs.
  - < <3 - <3 -3
  - Krauss "ACTIS" Cameras
  - Our " Actis ” Cameras are folding cameras of the highest degree of precision. They are made entirely of light metal and have their dimensions and weight cut down to the lowest limits. They are not affected by changes of temperature and are adapted for use in moderate climates as well as in the tropics.
  - Thanks to the thought and time bestowed upon the elaboration of these cameras they are endowed with qualities which entitle them to be looked upon as perfect hand cameras, and hence they can be operated under the same conditions and with the same advantage as field cameras whenever the necessity arises.
  - All the component parts are milled and machined instead of being merely stamped and pressed. By this means perfect precision in the movements and in the adjustment have been attained. On the outside the camera body is covered with morocco leather, whilst the internal fittings are lacquered black, dull or bright, all slides being polished and operating buttons nickeled.
  - The " Actis ” Cameras are the indispensible complement to the finest lenses of very great relative aperture which have been brought out in recent years.
  - The Krauss-Zeiss Tessars and the Krauss Trianars with rapidities of F/4.5 and F/6.3 mounted on " Compur ” shutters furnish the best equipment for these cameras which can be obtained.
  - In our " Actis ” Cameras the travelling base and all slides are large so as to ensure perfect rigidity. It is indeed the manner in which the travelling carnage moves upon the baseboard slides which determines the stability of the camera front with the lens attached. With lenses having large relative apertures it is absolutely necessary that the stability should be such that the axis of the lens may remain permanently at right angles to the sensitive plate, whatever may be the position of the travelling carriage on the baseboard slides. It is here where lies the weakness of most cameras of similar type.
  - 33
- p.33 - vue 35/76
- - T-==========E. KRAUSS, 18 ET 20, RUE DE NAPLES, PARIS ------------=-=---
  - The lens panel is interchangeable and can be placed in position or instantly removed, which affords a convenient means of using several lenses on the same camera and of quickly setting up screens for colour photography.
  - The bellows are made of leather of the best quality.
  - When the front of the camera is drawn towards the operator the catch sets the camera automatically to infinity. The camera is focussed for different distances by the rack and pinion motion. A focussing scale is engraved for different distances.
  - The lens panel can be put out of centre in both directions by means of a rack and pinion. The amount of the eccentricity does not vary with the diameter and hence with the aperture of the lens which happens to be attached to the apparatus.
  - One of the features of our " Actis ” camera is the very considerable eccentricity of which it is capable and which even in the smallest models may be as much as 15 to 20 millimetres.
  - The ground glass focussing screen is furnished with a hood, and the camera has a direct sighting view finder and a spirit level.
  - Finally, each camera has two sockets with standard screws, by means of which it may be set up on a tripod stand in either position. The 15 x 10-cm. (6 X 4-inch) and 18 X 13-cm. (71/2x5-in.) cameras (high models) with very long extensions have a third screw socket which ensures a better balance when the bellows are completely extended.
  - The " Actis ” cameras are excellently adapted for colour photography.
  - Table of approximate Dimensions, Weights, and Camera Extensions of the Krauss « ACTIS ” Camera.
  - ACTIS Camera Model For Plate DIMENSIONS Weight excl. of lens Camera Extension
  - Height Width Depth Least Greatest
  - cm. cm. cm. cm. grm. cm. cm.
  - High 6.5x9 12 9 4.5 650 6 21
  - oblong 8x10.5 13.5 11 5.5 800 6.5 31
  - 9x12 14.5 12 5.5 1.000 6.5 26
  - 10x15 18 13 6.5 1.200 9 44
  - 12x16.5 20 16 7 1.800 10 47
  - 13x18 21.5 16.5 7 1.850 10.5 50
  - Square 6.5x9 11 11 6 670 7 26
  - 8x10.5 14 14 6 950 8 31
  - 9x12 15 15 6.5 1.200 8 35
  - 10x15 18 18 7.5 1.700 9 44
  - 12x16.5 20 20 7.5 2.100 9 48
  - 13x18 21.5 21.5 8 2.450 9 52
  - Wide 9 x 12 12 15 6 900 7 27
  - Stereo 10x15 13 18 6.5 1.200 7.5 31
  - 13x18 16.5 21.5 7 1.900 8 40
  - Square 9x12 16 16 7 1.450 8 37
  - Stereo 10x15 18 18 7.5 1.800 9 44
  - 13x18 21.5 21.5 8 2.500 9 52
  - Pamphlet P. 54 in French on Krauss Actis Cameras will be sent (free) on application.
  - Cameras for English plate sizes, viz. quarter-plate and half-plate (4 1/4 X 3 1/4 in. and 6 1/2x4 3/4 in.), are made to order only.
  - 34
- p.34 - vue 36/76
- - 1 E. Krauss, 18 ET 20, RUE de Naples, Paris 1----------------------
  - “ ACTIS ” CAMERA, UPRIGHT MODEL
  - This model is the camera par excellence of the amateur who wishes to be able to tackle any kind of work without having to operate too complicated a piece of apparatus. The camera front is large enough to take lenses with a great aperture of F/4.5
  - The prices stated below apply to cameras with three single metal dark slides and lens mounted on Compur shutter with flexible wire release.
  - We are prepared, to special order, to supply the Actis camera as a low transverse model, the price being then the same as that of the upright pattern. These transverse models are also made, to order, for English plate sizes.
  - For Plates No. Equipped with lens mounted on Compur shutter Price Codeword
  - DESCRIPTION Aperture Focus
  - cm. 6.5 x 9 9x12 10x15 13x18 A B A B A B A B Krauss-Zeiss-Tessar Krauss-Zeiss Tessar Krauss-Zeiss Tessar Krauss-Zeiss Tessar F/4.5 F/6.3 F/4.5 F/6.3 F/4.5 F/6.3 F/4.5 F/6.3 cm. 12 12 15 15 16.5 16.5 21 21 Acosisca Acosibe Aconeva Aconebe Acodiza Acodizbe Acotreca Acotrebe
  - “ ACTIS ” STEREO-PANORAMIC CAMERA, TRANSVERSE MODEL
  - 0 E ! 1
  - I
  - This model has a very large lens panel capable of accommodating two stereoscopic lenses mounted on a " Compur ” shutter.
  - With the aid of a rack actuated by a pinion situated near the base of the sliding lens panel one of the two stereoscopic lenses can be brought into alignment with the centre line of the camera when panoramic views are to be taken with a short focus lens. The stereoscopic separation can be readily widened.
  - The lens panel can be removed at pleasure, so that a third lens of an appropriate focal length may be used in order to photograph in the ordinary way.
  - The prices stated below apply to cameras with three single metal dark slides and lenses mounted on Compur shutter with flexible wire release.
  - For Plates No. Equipped with lens mounted on Compur shutter Price Codeword
  - DESCRIPTION Aperture Focus
  - cm. 9x 12 10x15] 13 x 18 AA BB B1 Ba AA BB B1 AA BB B1 Two Krauss-Zeiss Tessars ... Two — — — Extra panel with one Tessar .. Two Krauss-Zeiss Tessars ... Two ... Extra panel with one Tessar.. Two Krauss-Zeiss Tessars.... Two — — — ... Extra panel with one Tessar.. F/4.5 F/6.3 F/6.3 F/6.3 F/4.5 F/6.3 F/6.3 F/4.5 F/6.3 F/6.3 cm. 10.5 12 13.5 15 12 12 16.5 13.5 13.5 21 Aclaraa Aclabebe Testrecopla Tesmicopla Aeladixa Aeladibe Teslacopla Aelatrera Aelatrobe Tesbecopla
  - 35
- p.35 - vue 37/76
- - 1 E. Krauss, 18 ET 20, RUE de Naples, Paris -
  - " ACTIS” CAMERA, SQUARE MODEL
  - The “ ACTIS ” Camera of square pattern has a reversible back frame which admits of transverse and upright pictures being taken without having to turn the camera as a whole. In addition, the baseboard can be dropped below the horizontal. On the other hand, the lens panel can be swung into perfect parallelism with the ground glass focussing screen and the sensitive layer. By a very simple device the base-board and the lens panel are rigidly fixed in position. This ingenious design admits of wide angle lenses being employed with these cameras, which are therefore universal in every sense.
  - 10
  - The prices stated below apply to cameras with three single metal dark slides and lenses mounted in " Com-pur "‘ shutters with flexible wire release.
  - For Plates No. Equipped with lens moui shutte DESCRIPTION ated on Co r Aperture mpur Focus Price Codeword
  - cm. 6.5x9 9 x 12 10x15 A E G A E G A E G A E G Krauss-Zeiss Tessar F/4.5 F/7 F/12.5 F/18 F/4.5 F/7 F/12.5 F/18 F/4.5 F/7 F/12.5 cm. 12 11.5 22-18 6 15 14.5 29-22 8.5 16.5 18.5 35-29 Carasixa Carasibe Japla Caraneva Caranebe Jabotpla Caradiza Caradizle
  - Krauss-Zeiss Double Protar composed of two Protar Lenses Suppl. W. A. Krauss-Zeiss Pro-tar Lens on panel, without shutter
  - Krauss-Zeiss Tessar Krauss-Zeiss Double Protar composed of two Protar Lenses Suppl. W. A. Krauss-Zeiss Pro-tar Lens on panel, without shutter
  - Krauss-Zeiss Tessar
  - Krauss-Zeiss Double Protar composed of two Protar Lenses Suppl. W. A. Krauss-Zeiss Pro-tar Lens on panel, without shutter
  - 13 x 18 F/18 F/4.5 F/7 F/12.5 F/18 8.5 or 11 21 18.5 35-29 11 or 14 Jacinpla Caratreza Caratrebe Jadepla
  - Krauss-Zeiss Tessar
  - Krauss-Zeiss Double Protar composed of two Protar Lenses Suppl. W. A. Krauss-Zeiss Pro-tar Lens on panel, without shutter
  - English sizes to order only. For ACCESSORIES (See page 53).
  - 36
- p.36 - vue 38/76
- - E. Krauss, 18 ET 20, Rue de Naples, Paris
  - “ ACTIS” CAMERA, SQUARE STEREO MODEL
  - II
  - 3
  - I, •
  - 5
  - This model embodies the highest degree of perfection coupled with the utmost ease in operating the apparatus b the absence of any complicated manipulations. The camera is of a square section and has a back frame which turn through an angle of 90° about its centre for taking transverse and upright pictures.
  - The baseboard has a triple carriage, which gives it a very long extension with great facilities for displacing the lens front.
  - The front baseboard with the travelling carriage can be dropped below the horizontal so as to completely clear the field of a lens with an extremely wide angle, whilst the lens panel swings back to restore the parallelism with the focussing screen. The camera front is large enough for the accommodation of a pair of objectives for stereoscopic work on a Compur shutter, with side motion for panoramic views. A movable division follows the horizontal and vertical displacements of the lenses. An arrangement is provided for taking two separate photographs on one plate, viz.
  - On a plate............................ 9 X 12 cm. 10 X 15 cm. 13 X 18 cm.
  - 7 12 x 10
  - 5 x 15
  - 5 x 15
  - Two views or portraits, high or low....... 6x9
  - Two panoramic views............................ 4 1 X 12
  - Two stereoscopic views....................... 4 12 X 12
  - 9 x 13
  - 6 12 X 18
  - 6 1 X 18
  - FOR PLATES No. Equipped with LENS mounted on COMPUR SHUTTER Price Codeword
  - DESCRIPTION Aperture Focus
  - cm. cm.
  - 9 x 12 A Krauss-Zeiss Tessar F/4.5 15 Steraneva
  - E Krauss-Zeiss Double Protar com- F/7 14.5
  - posed of two Protar Lenses For panel with : F/12.5 29-22 Sterabene
  - BB Two Krauss-Zeiss Tessars, stereo-
  - scopic, on Compur shutter F/6.3 9 Stesskocopla
  - G One Krauss-Zeiss W. A. Protar
  - without shutter E18 8.5 Jabotpla
  - 10 x 15 A Krauss-Zeiss Tessar F/4.5 F/7 16.5 Steradixa
  - E Krauss-Zeiss Double Protar com- 18.5
  - posed of two Protar Lenses. . For panel with : F/12.5 35-29 Steralbedix
  - BB Two Krauss-Zeiss Tessars, stereo-
  - scopic, on Compur shutter F/6.3 12 Stessincopla
  - G One Krauss-Zeiss W. A. Protar
  - without shutter F/18 8.5 or 11 Jacinthepla
  - 13 x 18 A Krauss-Zeiss Tessar F/4.5 21 Sferatreza
  - E Krauss-Zeiss Double Protar com- F/7 18.5
  - posed of two Protar Lenses For panel with: F/12.5 35-29 Steraletrez
  - BB Two Krauss-Zeiss Tessars, stereo-
  - scopic, on Compur shutter F/6.3 13.5 Stessacopla
  - G One Krauss-Zeiss W. A. Protar
  - without shutter F/18 11 or 14 Jadepla
  - For ACCESSORIES (See page 53).
  - 37
- p.37 - vue 39/76
- - -----------------i E. Krauss, 18 ET 20, Rue de Naples, PARIS I----------------------
  - KRAUSS TAKYR Camera with Focal Plane Shutter
  - 9 X 6.5cm. and 12 X 9cm.
  - Shutters mounted between the lenses or in the immediate neighbourhood of the objective are adapted for very moderate speeds only. So soon as one attempts to give shorter exposures than 1/100 second with these shutters one encounters insurmountable difficulties.
  - With focal plane shutters alone exposures of the order of 1/1000 second may be given with modern lenses of the highest light-transmitting power, such as our Krauss-Zeiss Tessar F/4.5. Moreover, a focal plane shutter will transmit two to three times as much light during the exposure as a centrally opening shutter working under similar speed conditions.
  - The KRAUSS TAKYR is a compact metal camera of a high degree of precision. In design it is
  - TAKYR
  - KRAUSS
  - both substantial and elegant. The body of the camera is cast in one piece, drilled, milled, and adjusted for the attachment of the shutter. In the Krauss Takyr focal plane shutter the blind-slit passes very close to the sensitive surface, being only 4 mm. away from it, and it ensures a maximum passage of light. Moreover, its action is smooth, simple and reliable. It does not uncover in winding. By simply operating a button the shutter is made to give speeds ranging from 1/1000 to 1/40 second, and in conjunction with a slowing brake with clockwork movement the speeds can be varied from 1/40 to about one second. The time exposures are made in single or double time. The shutter has finger and wire release.
  - The lens panel can be displaced horizontally and vertically by double slides in the 12 X 9 cm, model and by a slide and eccentric in the 9 X 6.5 cm. model. It is connected to the back portion of the camera by four stiff metal stays, which ensure its perfect stability. The camera is focussed from infinity to two yards by the helical focussing mount of the lens.
  - A view finder consisting of a rigid wire frame, which
  - folds down against the camera front, and a sighter mounted upon the rear body enables the operator to compose his picture with the best possible effect. The camera has two screw sockets with standard threads for attaching it to a tripod stand, and to set it in a strictly horizontal position it is fitted with a spirit level.
  - The ground glass focussing screen is fitted with a hood.
  - A leather handle is provided by which to carry the camera.
  - Every camera is supplied with six single metal dark slides, together with a flexible release and direc tions for using the apparatus. The camera may likewise be furnished with a changing box for 12 plates and a filmpack adapter.
  - For Plate Dimensions Weight No. Lens in Helical Focussing Mount H Price Codeword
  - DESCRIPTION Aperture Focus
  - cm. cm. grm. cm.
  - 6.5x9 13 9 4.5 800 A Krauss-Zeiss Tessar F/4.5 12 Takisixa
  - 9x12 16 12.5 5 1.000 A Krauss-Zeiss Tessar F/4.5 15 Takineva
  - For ACCESSORIES (See page 53).
  - Pamphlet P. 55 in French respecting the Krauss Takyr Camera free on application.
  - 38
- p.38 - vue 40/76
- - E. Krauss, 18 ET 20, Rue de Naples, Paris
  - THE “KRAUSS” PHOTO REVOLVER
  - Uss PARIS
  - to a
  - (. 9 o
  - O o
  - 1 '' ^
  - 1 III iO
  - Patented S. G. D. G., with changing box for (48 plates 36 x 22 mm.) and roll film chamber with a capacity of 25, 50 and 100 exposures.
  - This " little wonder ”, as it has been called by many of its users, made its first appearance in 1921. Since then we have found occasion to improve it, and lately we have completed it by the addition of a roll film chamber, which has rendered its use still more universal than it was before.
  - Dimensions of the camera......
  - — changing box-Size of the useful picture.... Weight of the unloaded apparatus
  - 42.5 x 29.5 x 50 mm.
  - 90 X 34 X 46 mm.
  - 20 x 30 mm.
  - 22 oz.
  - DESCRIPTION
  - The apparatus is of pocket size. It is made of metal throughout and is a true instrument of precision. The lens is an extra rapid Tessar F/ 4.5, f = 40 mm. in helical focussing mount for all distances from infinity to about one yard. It is fitted with an ever-set shutter giving instantaneous exposures at four different speeds ranging from about 1/25 to 1/100 of a secona.
  - Resembling a revolver in its external appearance, it consists of the photographic camera with a rigid metal body, which is closed by a cover in the form of a finder, and a changing box for 48 plates. The camera on the changing box can be withdrawn by a sliding motion :
  - 1) To change the plates.
  - 2) For being mounted on the enlarging cone.
  - The advantages of the apparatus are the following :
  - Its small size and weight, which admit of its being comfortably carried in the pocket.
  - The accuracy with which the instrument can be focussed by means of a patented device by which the sensitive surface is placed strictly at the focus of the lens and exactly at right angles to the axis of the lens (see Pamphlet, P. 53).
  - The fact that the apparatus is capable of holding 48 plates without recharging renders it invaluable on travels and excursions.
  - Only two operations are required to set the apparatus in action, all that is necessary being to draw a fastener and to pull a trigger.
  - There is the further possibility of operating the apparatus with one hand, so that pictures can be obtained by an operator riding on a cycle.
  - A direct view-finder with a concave lens with cross-lines and sighter shows accurately the composition of the picture as it will appear on the plate.
  - The quality and rapidity of the lens enable one to take pictures at all times, even during a winter’s mist, from a going train carriage, and to snapshot fellow travellers in the same compartment.
  - 39
- p.39 - vue 41/76
- - E. Krauss, 18 ET 20, Rue de Naples, Paris
  - In short, the Photo Revolver, thanks to its very exact performance and the advantages enumerated above, constitutes an ideal apparatus for the amateur who wishes to possess at a moderate cost a light and very compact camera which enables him to obtain a large number of pictures with a very rapid lens having an iris-diaphragm, capable of being focussed, and giving negatives of such exquisite sharpness that they bear being enlarged to a considerable extent.
  - Our special pamphlets P. 53 and 57 in French furnish a detailed description of the Photo Revolver, particulars of the manner of using it, and the advantages which render this surpassingly delightful instrument an indispensible travelling companion.
  - PRICE OF THE KRAUSS PHOTO REVOLVER with changing box for 48 plates, in leather case with lock and strap.
  - WITH LENS IN SPECIAL HELICAL FOCUSSING MOUNT
  - No. ———^ . — Price Codeword
  - DESCRIPTION Aperture Focus
  - A Krauss-Zeiss Tessar F/4.5 mm. 40 Phoreva
  - Accessories :
  - M MP PP CP N NP NOP 0 P Q Extra changing box — Do. for roll films Nickel silver plate carrier Steel gauge for retrimming the plate carriers Closed trough for slow development, nickel-plated throughout, for developing 48 plates in one operation Circular troughs for developing, fixing and washing films Metal frame for developing films Special post-card enlarging cone making use of the Tessar lens F/4.5 of the Revolver Condenser for printing with artificial light Enlarger of cloth-lined cardboard with achromatic lens, post-card Phorem Phorempe Phopopa Phopocal Phocupla Phocupel Phocape Phocone Phocondens
  - R S SO S1 S 2 S3 S 4 S 5 size Negative filing box with 200 grooves for the accommodatK 400 plates, in mahogany-stained and varnished wood. Plate drain with 25 grooves, varnished wood Photographic plates in boxes of 4 dozens : — Lumiere, special, without grain, per doz — Jougla, mauve label, per doz — Lumiere, blue label,re'doz — — orthochromatic without screen, per doz . . . — Grieshaber, violet label, per doz — — Reporter, per doz Gevaert roll films : in of up to Phoplifi Phoboite Phojout Pholu Phojou Pholuble Pholusec Phogrili Phogrirep
  - SP 1 SP 2 SP 3 No. 1 for 100 exposures No. 2 — 50 - No. 3 — 25 - Phopelum Phopede Phopetri
  - 40
- p.40 - vue 42/76
- - ------1 E. Krauss, 18 ET 20, Rue de Naples, Paris > -
  - “LILLIPUT” and “ROLLETTE” Waistcoat Pocket Cameras
  - < ~o <
  - « LILLIPUT ” Camera for 6x4.5-cm. plates nd film packs « ROLLETTE ” for roll films of 6.5x4 or 8x5 cm.
  - Lilliput
  - li
  - Rollette
  - These cameras are of the most exacting quality and finished in black lacquered metal. The body only of the Lilliput camera is covered with black morocco. The back and front with the lens and shutter are connected by four absolutely rigid nickel-plated slot stays. The bellows are of leather. Focussing from 5 feet to infinity is effected by shifting a button along a scale attached to the lens front and can be done equally well whether the camera is folded up or opened. Reflecting view finder, reversible for taking horizontal or vertical pictures, and additional picture finder with sighter. The Lilliput camera has a socket with standard screw. This camera is supplied with a ground glass focussing screen in metal frame and with three single dark slides. The equipment includes a Compur shutter No. 00 with a greatest speed of 1/300 second, or a Pronto shutter No. 00 with four speeds ranging from 1/25 to 1/100 second, B and T with flexible release. The cameras are supplied in pliable leather case with nickeled clasp.
  - Dimensions and weight................. Lilliput Rollette No. I or II
  - Dimensions........................... 88x 67 x 30mm. 128 x 65 x 25 mm.
  - Weight.............................. 10 3/4 oz. 10 3/4 oz.
  - N. LENS Shutter Lilliput 6x4.5 cm. Rollette No. II 8 X 5 cm. Rollette No. I 6.5 x 4 cm.
  - Description Aperture Focus cm. Price Codeword Price Codeword Price Codeword
  - A D Krauss-Zeiss Tessar Krauss Trianar.... F/4.5 F/4.5 7.5 7 Compur Pronto Litess Litria Potass Rotria Rodetess Rodetria
  - 41
- p.41 - vue 43/76
- - ---------------1 E. Krauss, 18 et 20, Rue de NAPLES, PARIS-----------------
  - THE “ TYKTA” CAMERAS FOR PLATES AND FILM PACKS
  - p
  - Tykta la. Finely finished model. The body is of wood polished black inside and covered with imitation leather. The bellows are of black leather. The folding lens front is lacquered black. The apparatus is fitted with a large reversible brilliant view finder with spirit level, it has two screw sockets and double extension operated by a rack and pinion for focussing by the motion of the lens carrier in stirrup frame, the lens carrier being movable transversely by hand and vertically by a milled screw head. Each camera includes three single metal dark slides.
  - Tykta IVa
  - Tykta IVa. De luxe model. Identically similar to the preceding model but more elegantly finished. The camera is covered with black morocco. Both lens motions are effected by a milled screw head. The carriage is very wide and is in one piece. The equipment includes three single metal dark slides.
  - Plate and Camera Sizes No. LENS Shutter Price Codeword
  - DESCRIPTION Aperture Focus
  - cm. F/ cm.
  - Model I
  - 6.5x9 D Krauss Trianar . . . . 6.3 10.5 Vario 0 Tipri
  - Dim.
  - 10x13x5
  - 8.3x10.8 D Krauss Trianar.... 6.3 12 Vario 0 Tripide
  - 11x14 DE — — 6.3 12 Ibso 0 Tidepri
  - x5.5
  - Model IVa of wood.
  - 6.5x9 AA Krauss-Zeiss 1 essar 4.5 10.5 Compur 0 Tysixa
  - Dim. B — — — 6.3 12 — Tysibe
  - 10x13 C Krauss Trianar.... 4.5 10.5 — Tycesix
  - x 4.5 D — — .... 6.3 10.5 Vario 0 Tydesi
  - 8.3x10.8 AA Krauss-Zeiss Tessar. 4.5 13.5 Compur 0 Tyoce
  - Dim. B Krauss Trianar.... 4.5 13.5 — Tyodet
  - 11x14 DE — — 6.3 12 Ibso 0 Tyodib
  - x 5.5 A Krauss-Zeiss Tessar. 4.5 13.5 Compur 1 Tyneva
  - 9x12 AA — — — 4.5 15 2 Tyktanev
  - Dim. B — — — 6.3 13.5 0 Tyneube
  - 12x16x5 C Krauss Trianar.... 4.5 13.5 1 Tyceneuf
  - CC — — 4.5 15 2 Tyneufce
  - D — — .... 6.8 13.5 Vario 0 Tydebe
  - DE — — .... 6.3 13.5 Ibso 0 Tudebebe
  - 10x15 A Krauss-Zeiss Tessar. 4.5 16.5 Compur 2 Tydiza
  - Dim. B — — — 6.3 16.5 1 Tydizbe
  - 14x19x5 C Krauss Trianar.... 4.5 16.5 2 Tycediz
  - D — — 6.3 16.5 - 1 Tydedeca
  - 13x18 B Krauss-Zeiss Tessar. 6.3 21 - 2 1 ytrezbe
  - Dim. D Krauss Trianar.... 6.3 21 - 2 Tydetrez
  - 17x23x6
  - Model IV of metal.
  - 6.5x9 A Krauss-Zeiss 1 essar. 4.5 10.5 Compur 0 Tymab
  - Dim. B — — — 6.3 12 — 0 Tymec
  - 9x 12x4 C Krauss Trianar.... 4.5 10.5 — 0 Tymid
  - D — — 6.3 10.5 Vario 0 Tymof
  - 9x12 A Krauss-Zeiss Tessar. 4.5 13.5 Compur 1 Tymanev
  - Dim. AA — — — 4.5 15 — 2 Tymaa
  - 11 x 15 B — — — 6.3 13.5 - 0 Tymebenev
  - x 4.5 C Krauss Trianar .... 4.5 13.5 - 1 - Tymce
  - CC 4.5 15 2 Tymcece
  - D — — .... 6.8 13.5 Vario 0 Tymdenev
  - DE — — .... 6.3 13.5 Ibso 0 Tymedev
  - 42
- p.42 - vue 44/76
- - 1 E. Krauss, 18 et 20, RUE DE Naples, Paris ==============
  - TYKTA POCKET ROLL FILM CAMERA
  - so
  - o
  - Tykta No. II, 9 X 6 cm. Tykta No. Ila, 11 X 6.5 cm. Tykta No. III, 10.5 X 8 cm.
  - Camera : 16.4 X 3.2 X 7.8 cm. Camera : 21.5 X 3.5 X 10 cm. Camera : 19.5 X4X 11,5 cm.
  - Weight : 22 oz. Weight : 26 oz. Weight : 34 oz.
  - These cameras are in great favour with tourists and cyclists both on account of their compactness and their small weight.
  - The TY KTA No. III for 10.5 X 8-cm. films is of black polished wood covered outside with black morocco. It is also available for use with 12 X 9-cm. plates without special adapter, in that the bottom of the apparatus receives directly the rebated metal dark slides or the ground glass focussing screen with hood. A rack and pinion is provided for focussing, the camera front is of the stirrup pattern and admits of the lens being displaced horizontally by hand and vertically by a milled head.
  - The TY KTA CAMERAS No. II for 9x6 cm. and No. Ila for 11 X 6.5 cm. are adapted for films only and are made of metal throughout. In both the lens is focussed by a radial lever passing over a scale. The lens front is in stirrup form and admits of displacement either way. The camera is fitted with a large reversible brilliant finder and a level, and it has two sockets with standard screw threads.
  - The lenses are mounted on Compur. Ibso or Vario shutters with flexible release.
  - Model No. LENS Focus Shutter Price Codeword
  - Plate Size Description Aperture
  - No II 6x9 Ila 6.5x11 III (1) 8x10.5 (1) Attachm A B C D A B C D DE A B C D DE ent for fram Krauss-Zeiss Tessar Krauss Trianar Krauss-Zeiss Tessar. Krauss Trianar.... Krauss-Zeiss Tessar. Krauss Trianar.... e with ground glass plate F/4.5 F/6.3 F/4.5 F/6.3 F/4.5 F/6.3 F/4.5 F/6.3 F/6.3 F/4.5 F/6.3 F/4.5 F/6.3 F/6.3 and three n 10.5 12 10.5 10.5 12 12 12 12 12 12 13.5 12 12 13.5 ietal 12 Compur 0 - 0 — 0 Vario 0 Compur 0 — 0 - 0 Vario 0 Ibso 0 Compur 0 — 0 — 0 Vario 0 Ibso 0 X 9-cm. slides. Fitysixa Fitysibe Fitycesix Fidesity Fideba Fidece Fidedi Fidefo Fidegu Fityocta Fitybeoct Ficetyoct Fioctyde Fideocty Fipla
  - 43
- p.43 - vue 45/76
- - -----------------1 E. Krauss, 18 ET 20, Rue de Naples, Paris I----------------------
  - “MENTOR” CAMERAS
  - with Focal Plane Shutters
  - < < <
  - These irreproachably designed cameras are made regularly in the following models
  - A. REFLEX CAMERA TYPE :
  - 1) Folding Reflex Camera,
  - 2) Square Reflex Camera with Revolving Back Frame,
  - 3) Broad Oblong Reflex Camera.
  - B. FOLDING CAMERA TYPE :
  - 4) Folding Camera,
  - 5) Universal Folding Camera.
  - The REFLEX CAMERAS. The exact composition of the picture on the plate and perfect focussing of the objects which are to be photographed have at all times engrossed the attention of amateurs, professional photographers, and designers.
  - The first named requirement is generally fulfilled sufficiently well by the use of a view-finder with sighter, as specially designed for certain cameras.
  - The other condition is more difficult of attainment, as it depends upon the operator’s ability to estimate distances, which is often attained only after much practice, so that the picture is liable to be far from sharp.
  - The " Reflex ” Cameras get over these difficulties by enabling the operator to arrange the exact disposition of the picture on the plate at the same time that he sets the focus, even while the object is in motion. At the right psychical moment he has then only to depress the release and he obtains an instantaneous photograph of the subject as he actually sees it.
  - The " Reflex ” Cameras alone therefore provide the certainty of success at the moment of release. They are fitted with focal plane shutters, which admit of snapshots being taken at all speeds from 1/8 to 1/1200 of a second with a very large passage of the available light.
  - The focal plane shutter, with which the " Mentor " Cameras are equipped, is substantial and simple in design. In it the width of the slit can be set from without from 1/5 to 8 cm. The spring tension is easily adjusted for six different speeds by means of a knurled button. A table of shutter speeds (up to 1/1200 second) is fixed to each apparatus. It winds without uncovering the plate when the mirror is lowered.
  - The mirrors mounted on the " Mentor Reflex ” Cameras are silvered in front and are absolutely plane, giving an undistorted image.
  - The lens panel detaches very readily.
  - The camera bodies are of a very specially selected wood with metal bindings and covered with morocco leather. The back is provided with a ground glass plate focussing screen with a hood. The hood and bellows are of black leather. All mountings are part nickel-plated and part lacquered black. The camera is fitted with a handle and strap and has two sockets with standard screw threads.
  - 44
- p.44 - vue 46/76
- - 1 E. KRAUSS. 18 ET 20, Rue de Naples, Paris [
  - “MENTOR” Reflex Folding Camera
  - This camera is a great favourite with amateurs and com
  - bines in a comparatively small volume the great advantages
  - of the “REFLEX ” camera principle. The mechanism of the apparatus is of a substantial design, which ensures a perfect result from every point of view. Focussing is effected by the helical mount of the lens. Each camera is supplied with three double dark slides and flexible release.
  - The prices quoted below include a Krauss-Zeiss Tessar Lens F/4.5 in helical focussing mount.
  - 12 X 16.5 13 x 18 cm.
  - 6 cm.
  - 23 —
  - 34 —
  - 6 1/2 lbs.
  - 21.3 cm.
  - 21 —
  - DIMENSIONS, WEIGHT (excl. of optical equipment) and PRICES.
  - For plates 9 x 6.5 8 X 10.59 x 12 10 x 15
  - Thickness 4.5 cm. 5 cm. 5.5 cm.
  - Width 14.5 — 17 — 20 -
  - Height 20 — 24 — 27 -
  - Weight .... 2 3/4 lbs. 3 1/4 lbs. 4 1/2 lbs.
  - Extension 15.2 cm. 17.5 cm.
  - A. Lens focus 12 - 15 — 16.5 —
  - Price...........
  - Codeword Replihuit Replineuf Replidix
  - 6,5 x 9 8x10.5 (1) 9 x 12 10 x 15
  - Replidouze Replitreize
  - 12 x 16.5 13 x 18
  - “MENTOR ” Square Reflex
  - Camera
  - with revolving back frame
  - (I) With revolving back frame.
  - The back frame of this camera provides an easy means of taking pictures in a horizontal and vertical position. A special device changes automatically the position of the upper ground glass for high or transverse pictures to agree with that of the back frame. The eye is focussed by means of a double rack actuated by a large knurled button, by which the camera can be set quickly and accurately and which gives a sufficiently long and stable extension to admit of pictures being taken at very short distances (from infinity to about 20 inches). The lens can be displaced horizontally and vertically. The lens is contained in a sunk mount. Every camera is supplied with three double dark slides and a flexible release.
  - The prices quoted below include a Krauss-Zeiss Tessar Lens F/4.5 in sunk mount.
  - 45
- p.45 - vue 47/76
- - ......-- 1 E. Krauss, 18 ET 20, Rue De Naples, Paris I------------------------
  - DIMENSIONS, WEIGHTS (without optical equipment) and PRICES of the Square Model
  - Reflex Camera.
  - Plate Size . 6.5x9 8x 10.5 9x12 10x15 12 x 16.5 1 3 X 1 8 cm
  - Length 13 cm. 18 cm. 18 cm. 21 cm. 21 cm. 22 cm.
  - Width 21 — 15 — 16.5 — 20 - 22 — 23 -
  - Height 16 — 19 — 20 — 24 — 26 — 27 —
  - Weight 1 600 gim. 2.500 grm. 2.600 grm 4.000 grm. 4.500 grm. 4.800 grm.
  - Longest extension... 19 cm. 26 cm. 30 cm. 35 cm. 35 cm. 36 cm
  - Shortest extension... . 13 - 16 - 17.5 — 20.5 — 20.5 — 20.5 — .
  - A. Lens focus . 13.5 - 16.5 — 18 — 21 - 21 — 21 —
  - Price Recasix Recahuit Recaneuf Recadix Recadouze Recatreize
  - Codeword
  - Wide Oblong Reflex CAMERA and Stereo Reflex Camera
  - 9 ill
  - This model differs from the square pattern by its reduced
  - dimensions and weight. It is intended for use in the trans-verse position only, which conforms to the direction in which most objects move. The lens is focussed by means of a double rack motion The lens, which has a shorter focus than in the square model, is supplied in a sunk mount.
  - The stereoscopic models are equally adapted for taking pa-oramic views. For this purpose an extra panel with a lens of longer focus can be used, or an extra panel with a lens flange or an extra lens mount (not in
  - eluded in the price) for using one of the stereoscopic enses with small diaphragm.
  - Each camera is supplied with three double dark slides and a flexible release.
  - The prices quoted below include a Krauss-Zeiss Tessar F/4.5 in sunk mount R.
  - DIMENSIONS, Weight (excl. of optical equipment) and PRICES
  - Plate size................
  - Length ....................
  - Width ....................
  - Height....................
  - Weight...................
  - Longest extension........
  - Shortest extension.......
  - A. Lens focus............
  - Price.....................
  - Codeword........... Relasix
  - 6.5 x 9
  - Oblong Reflex Camera
  - 6.5x9 8x10.5 9x12 10x15 12x16.5 13x18 cm
  - :— oi—-— •. " - ' e ni
  - 9.5 cm. 13.5 cm. 15 cm. 18 cm.
  - 12 — 16 — 20 — . 22 —
  - 14 - 16 — 18 - 21 -
  - 1.100 grm. 13.5 cm. 1.800 grm. 19.5 cm. 2.400 grm. 22.5 cm. 3.300 grm. 30 cm.
  - 9 - 13 - 14.5 — 17.5 —
  - 12 — 15 — 16.5 - 21 -
  - Relahuit Relaneuf Reladix Reladouze Relatreize
  - 8x10.5 9x12 lOx 15 12x16.5 13x18
  - Plate size.................................................
  - Length.............................. Width ..............................-....................
  - Height.....................................................
  - Weight................................................... Longest extension........................................ Shortest extension....................................... A. Focus of paired lenses................................
  - Price.....................................................
  - Codeword.................................................
  - Stereo Reflex Camera
  - 6 x 13 10x15 9x 18 cm.
  - 9.5 cm. 15 cm. 14 cm.
  - 18 - 20 - 23 —
  - 14 - 18 — 17 —
  - 1.600 grm. 13.5 cm. 2.500 grm. 22.5 cm. 2.700 grm. 19 cm.
  - 9 — 14.5 - 13.5 -
  - 9 - 15 — 13.5 —
  - Restesix Restedix Resteneuf
  - 46
- p.46 - vue 48/76
- - -====-===== E. KRAUSS, 18 ET 20, RUE DE NAPLES, PARIS------------------
  - Noted French Cameras
  - equipped with Krauss-Zeiss Lenses
  - ~3o co co
  - “CORNU”ONTOSCOPES
  - for 107 x 45 mm. and 13 X 6 cm. plates
  - Model No. Illa, Stereoscopic Camera Model No. IV Stereo-panoramic Camera
  - W
  - 0,
  - , 8 2
  - 11 H
  - Metal twin bodies of silvered copper, oxidised and enamelled, well adapted for touring and the tropics. A special device admits of focussing from a yard to infinity, whilst ensuring perfect and permanent parallelism. The shutter is between the lenses, it transmits a large proportion of light and is set by a metal air piston brake giving speeds from a second to 1 100 second. By a patented device the action of the brake can be momentarily suspended for the purpose of increasing the speed through 1/150, 1/200, 1/250 to the maximum speed, which is 1/300 second for the 13 x 6-cm. and 1/400 second for the 107 x 45-mm. camera. Upward displacements of the lens are converted into downward displacements by inverting the camera. A brilliant view-finder is fitted at the side to hold the camera on the level of the eyes, an additional reflecting view-finder between the lenses to operate on a stand or on a level with the chest. The camera has an automatic changing box for twelve plates with a pliable steel blind, by means of which loading and unloading can be effected by a single movement. There is also an automatic exposure marker. The camera may also be used at the operator’s option, with :
  - Single metal dark slides by means of an intermediate, changing box for roll films, film pack adapter, or special dark slides for autochrome plates.
  - Ontoscope with changing box for twelve plates and leather pouch.
  - Model No. Plate Size LENSES Price Codeword
  - Description Aperture Focus
  - III IIIa IV 10.7x 4.5 cm. Ste eo 13x6 cm. Stereo 13x6 cm. Stereo-Panorama Krauss-Zeiss Tessar Krauss-Zeiss Tessar Krauss-Zeiss Tessar F/4.5 F/6.3 F/4.5 F/6.3 F/4.5 F/6.3 55 mm. 55 — 85 - 85 - 85 — 85 - Ontotheorb Ontotessun Onthorite Ontesseux Onpathorit Onpatesseu
  - Prices of Accessories will be stated on application.
  - 47
- p.47 - vue 49/76
- - -========== E. KRAUSS, 18 ET 20, RUE DE NAPLES. PARIS-============1
  - “GAUMONT 53
  - BLOCK
  - NOTES
  - AND STEREO BLOCK
  - NOTES
  - CAMERAS
  - cameras can
  - be easily concealed in the pocket, the lens being
  - These highly finished metal folding ------u --------------, ----------------i n
  - protected by a slide which covers it entirely and thereby guards it against every kind of shock. .By the withdrawal of this slide the lens becomes exposed, the shutter is wound, and the view-finder is put in position, all three operations being thus performed by a single act. The sector shutters have an air piston brake which ensures a reliable and invariable action at all temperatures. It gives variable speeds and time
  - exposures.
  - 50 3 @ SIC 9 7 11 o0
  - The metal parts are lacquered black, the four struts being nickel-plated. The bellows are of leather. The lens is provided at the user’s option with an infinity or hyperfocal catch in the 6 X 4.5 cm. ord., 107 X 45 mm. and the 13 X 6 cm. stereo cameras. The lens is focussed in the 9 X 6.5 cm. ord. camera by means of a helical mount and in the 6 X 4.5 cm. M. P. and the 9 X 6.5 cm. M. P. cameras by the displacement of an internal frame which carries the dark slide.
  - All these models can be supplied with an A. J. G. changing box for 12 plates, with the exception of the 13x6 cm. model, and with film pack adapters with the exception of the 107 X 45 mm. and 13x6 cm. stereo cameras.
  - Model and Plate Size Dimensions Weight Krauss-Zeiss Tessar Lens Accessories included in the price Price Codeword
  - cm. mm. grm.
  - 6x4.5 ord. 90x65x25 320 F/6.3,f= 72 mm. Felt case, 6 dark slides in case Blonosix
  - 9 x 6.5(1) ord. 120x80x50 740 F/6.3,1 - 107 - Leather bag, 12 dark slides Blononev
  - in case
  - 10.7 x 4.5 stereo 135x60x32 455 F/6.3,1-55 - Felt case, 6 dark slides in case Blosteca
  - 13x6(2) stereo 160x75x35 590 F/6.3,/=80 - Felt case, 12 dark slides Blosiste
  - in case
  - 6x4.5 M.P. 100x 67 x 50 455 F/4.5,/=72 - Felt case, 6 dark slides in case Blosixem
  - 9x6.5 (1) M.P. 134x93x69 875 F/4.5,1-112 — Leather bag, 12 dark slides Blonevem
  - in case
  - Prices of Accessories, on application.
  - (1) Lens capable of eccentric displacement in two directions.
  - (2) Lenses eccentric by reason of the design.
  - 48
- p.48 - vue 50/76
- - 1 E. Krauss, 18 ET 20, RUE de Naples, Paris .
  - " GAUMONT " SPIDO and STEREOSPIDO CAMERAS
  - The “ Photo Jumelle ” is a typically French representative of high-class camera work. Though rather more bulky than the modern folding cameras, the “ Spido ” Cameras have appreciable advantages over the latter in the matter of optical adjustment, rapidity of action, and the hard wearing qualities of its parts.
  - Spido
  - on
  - Stereo Spido
  - Metal Stereo Spido
  - The bodies of the cameras are made of clamped wood and are covered with black morocco leather. The “ Spido ” Cameras have a lens panel which is capable of displacement in either direction. This displacement is communicated to a sighter, so that the sighting always agrees with the photographic image. In the case of the Stereo Spido Cameras the horizontal displacement is replaced by a panoramic displacement, which admits of instantly taking either stereoscopic or long transverse views.
  - The camera is fitted with a DECAUX shutter with central opening and made of metal throughout. It gives with unvarying regularity all speeds from 1/5 to 1/175 second. These cameras are always supplied with a changing box for twelve plates with automatic exposure marker. The latter can be removed in broad daylight for focussing on the ground glass or for changing the box. The user has the option of employing double dark slides with blind-shutters, single nickel dark slides in conjunction with an adapter, or a film pack slide. The lens is focussed by means of its helical mount with the aid of a metrical distance scale. In the Stereo Spidos the helical motions and the iris diaphragms are coupled by two links. The cameras are provided with two screw sockets and two levels.
  - THE METAL STEREO SPIDO CAMERAS, Models A and C, are two very elegant instruments made of a pure and very hard nickel which is unaffected by damp air and changes of temperature.
  - Model A is fitted with a panoramic displacement, 1 ke the Stereo Spidos of wood. Model C, on the other hand, by reason of the large diameter of its lenses (Tessar F/4.5), has only a vertical motion. In Model C the Decaux shutter is mounted between the lenses and the focussing is done by the displacement of the camera front parallel to itself and without any loss of motion.
  - In the place of the standard changing box for 12 plates of ordinary thickness the 13 X 6-cm. Stereo Spido Cameras (of metal and wood) may be used with a special changing box for 24 Eastman films.
  - The GAUMONT SPIDOS AND STEREO SPIDOS are supplied with a changing box for 12 plates, automatic exposure marker, ground glass focussing screen, shutter release, and sheep skin bag. The D 13 X 6-cm. model is supplied with ground glass and six single dark slides.
  - Model and Plate Size cm. Dimensions mm. Weight grin. LENSES Price Codeword
  - Description Aperture Focus cm.
  - Wood Models
  - 9x6.5 180x 90X155 1,380 Krauss-Zeiss Tessar F/6.3 11 Spisix
  - 12x9 214x 120x 170 1,785 — F/6.3 13.5 Spinev
  - 15x 10 235x 135 x 200 2,475 — F/6.3 15.5 Spidiz
  - 13x6 (1) 150x 85x170 1,450 — F/6.3 8.4 Stespisix
  - 16x8 (1) 185x 108x 205 2,100 — F/6.3 11 Stespidoct
  - Metal Model
  - A 13x6 (1) 135x 70x155 1,700 — F/6.3 8.4 Mespia
  - C 13x6 (2) 135x 70x 155 1,700 — F/4.5 8.4 Mestespice
  - D 13x6 (2) 100x 80x 165 800 Krauss-Trianar F/6.3 8 Spistede
  - Prices of Accessories on application.
  - (1) Stereo Panorama. — (2) Stereoscopic.
  - 49
- p.49 - vue 51/76
- - -----------------1 E. Krauss, 18 ET 20, Rue de Naples, Paris •------------------------
  - X % [
  - F
  - LEROY CAMERAS
  - (by E. GUERIN & Co.)
  - LEROY STEREO PANORAMIC CAMERA, (Patented in France),for13 x6-cm. plates, which gives most excellent results with a maximum of simplicity and versatility (stereoscopic views, panoramas and portraits). The apparatus is made of metal throughout.
  - One of the lenses, which is eccentrically mounted on a revolving panel, can be brought to the centre at the same time that the stereoscope division is automatically put out of action. The camera is fitted with a Davanne view-find-er, sockets with standard screws for horizontal and vertical views, level and shutter release. The design ensures a normal lens displacement. The camera is supplied in black or tan cowhide case capable of accommodating the camera together with six dark slides or with a changing box for 12 plates.
  - s i co
  - MINIMUS LEROY, (Patented) for 13 X 6 cm. of metal throughout, of finest workmanship, stereoscopic only, with variable lens displacement. The camera is supplied with a black or tan cowhide case, a stand for time exposures, and a shutter release.
  - LEROY STEREO CLASSIFIER, (Patented)
  - for classifying, examining and projecting the stereoscopic 13 X 6-cm. lantern slides. The mechanism is compact, adapted for hard wear and exact, lifting the lantern slides by gripping them at the sides. The eyepiece separation and focussing can be made with the utmost rapidity.
  - One handle for raising and lowering controls the whole mechanism. The Stereo Classifier is supplied with a classifying box. It may be completed by a pedestal and attachments for projection (respecting which a separate pamphlet in French may be had on application).
  - D. Stereo Classifier, walnut or mahogany. Steclabo
  - E. — with metal casing... Steclame
  - F. Pedestal of walnut or mahogany with six slide cases............................... Stesocle
  - Model LENSES with six nickel dark slides _ with changing box
  - Description Aperture Focus mm. Price Codewor d Price Codeword
  - A B C A (1) B (2) Stereo-Panoramic 13 X 6-cm. Camera Krauss-Zeiss Protar. F/9 1 82 Krauss-Zeiss Tessar.) F/6.3 | 83 Attachment for variable lens displacement Minimus 13 x 6-cm. Camera Krauss-Zeiss Tessar. | F/6.3 f 75 | F/6.3 | 75 Stepapos Stepates .. va Minifix Miniva Stepama Stemales ... va Minimafix Minivama
  - (1) Model with fixed focus (2) Model with helical lens mount for focussing.
  - 50
- p.50 - vue 52/76
- - L-======-=-===E KRAUSS, 18 ET 20, RUE DE NAPLES, PARIS-------------
  - THE " MONOBLOC ” CAMERA
  - By Messrs. JEANNERET & Cie
  - Stereo-Panoramic Size 13x6 cm.
  - As the name implies, this camera is in tl sides, in consequence of which the apparatus
  - dark slides may be carried in the coat pockets, lenses can be displaced 12 mm. upwards and
  - form of a rectangular block without tapering n be readily used without a stand, by simply resting it on some piece of furniture, for taking stereoscopic or panoramic views of upright portraits., The following are the principal particulars of the Monobloc.
  - The equipment includes a shutter of maximum efficiency with speed control ranging from 1/300 second to several seconds, changing box of smallest dimensions (thickness only 18 mm.) containing six plate carriers of pure nickel, very light and interchangeable, so that several Film pack adapters are furnished to order. The 8 mm. downwards and moved out of centre for
  - panoramic views, while the stereoscopic division disappears automatically.
  - The camera has an accurate view-finder with stereoscopic and panoramic sighter, a plumbing pendulum, a spirit level, a rapid focussing arrangement with double scale with automatic setting of the 1ens, according to the stop in operation, so as to obtain the greatest depth in the picture with good definition from infinity to near. The autochrome screens are so arranged within the apparatus that there is no change in the focal adjustment.
  - The apparatus is supplied with two changing boxes for six plates each, a ground glass focussing screen, a shutter release, the whole being accommodated in a leather container with strap.
  - No. LENSES Price Codeword
  - DESCRIPTION Aperture Focus
  - A Krauss-Zeiss Tessar F/4.5 cm. 8.5 Monotor
  - B — F/6.3 8.5 Monotesse
  - C — F/3.5 8.5 Monotabis
  - 51
- p.51 - vue 53/76
- - -----------------i E. Krauss, 18 et 20, Rue de Naples, Paris I----------------------
  - RICHARD VERASCOPES
  - Sizes 10.7x4.5 and 13x7 cm.
  - The Richard Verascope is the prototype of stereoscopic cameras of the 107 X 45 mm. size and needs no praise.
  - The apparatus is in the form of a fixed tapering box containing the two dark chambers. It is made of silvered and lacquered brass.
  - It is fitted with a changing box for 12 plates made entirely of metal and provided with an automatic exposure marker. There are two view-finders, viz. a brilliant direct view-finder with sighter for taking photographs with the camera held on a level with the eyes, and an image erecting brilliant view-finder between the two lenses for use when the camera is mounted on a stand or held on a level with the chest. The lenses can be raised 8 mm. above the centre, and by simply inverting the camera this can be utilised as an equivalent to lowering the lens. The camera is provided with two levels.
  - The lenses, a pair of Krauss-Zeiss Tessars F/4.5 or F/6.3, can be stopped down to F/8 and F/16. The camera has a fixed focus giving sharp pictures.
  - From infinity to 22 feet at full aperture F/4.5 - 16- — F/6.3
  - — 121 feet with first stop F/8 — 6% — second — F/16 Nearer objects can be focussed by a focussing cap.
  - The roller blind-shutter operates between the lenses; it winds without uncovering the plate, and gives time as well as instantaneous exposures, the verified speeds being l/lOto 1/150 of a second in the Models Nos. 6 and 7, down to 1/400 second in Model No. 8.
  - The 13 X 7-cm. VERASCOPE takes also 13 X 6 cm plates but is otherwise identical in cons
  - ROMEOS RICHARD
  - truction to the preceding model. It has a focussing arrangement. Krauss-Zeiss Tessar lenses F/6.3 or F/4.5, f = 85 mm., iris-diaphragms coupled by linkage, vertical displacement of 11 mm., a shutter giving variable speeds ranging from 1/9 to 1/150 second., two view-finders, and a changing box for 12 plates with automatic exposure counter, and is supplied in a leather container.
  - The " HOMEOS ” is the latest achievement of the makers of the Verascopes. The apparatus is a stereoscopic camera for cinematograph films measuring 24 X 19 mm. It is made of metal throughout. The shutter gives variable speeds from 1/15 to 1/150 second as well as time exposures. It has two view-finders, a spirit level, five stops, viz. F/4.5, F/6.3, F/8, F/10 and F/20. The focus is set for infinity and gives sharp images for distances down to 5 feet. Objects as near as 18 inches can be focussed by means of a focussing cap mounted on a slide on the apparatus. The camera is designed for daylight loading and takes a roll film 45 inches long for 27 stereoscopic views. It has a mechanical exposure marker. The apparatus is supplied with a morocco leather case. The lens is a Krauss-Zeiss Tessar F/4.5, f = 28 mm.
  - RICHARD VERASCOPE WITH CHANGING BOX FOR TWELVE PLATES AND LEATHER CASE
  - Model and Plate Size LENSES Price Codeword
  - Description Aperture Focus
  - Verascopes : No. 6a, 107 X 45 mm. Krauss-Zeiss Tessar F/6.3 mm. 55 Veraxixa
  - No. 6b — — F/4.5 55 Verasibe
  - No 7a — I) — F/4.5 55 Verasepta
  - No 8a — — F/4.5 55 Verocta
  - 7x13 A — F/4.5 85 Veragranda
  - — B — F/6 3 85 Verabegran
  - Homeos — F/4.5 28 Homeos
  - Prices of Accessories on application.
  - (1) Same as No. 6b, but furnished with the following improvements : " Cunctator ”, or automatic release, giving instantaneous and time exposures from I to 30 seconds (or 2 to 60 seconds), block system, preventing the changing box being opera ed when the twelve plates have been exposed; note holder at the bottom of the changing box for the insertion of a shp of paper for noting particulars respecting the exposed plates; index showing the state of the changing box, i. e. whether empty, loaded or exposed; special screens, and set of eight carriers for autochrome plates.
  - 52
- p.52 - vue 54/76
- - E. Krauss, 18 ET 20, Rue de Naples, PARIS I ---------------------
  - CAMERA ACCESSORIES
  - DESCRIPTION FOR PLATES cm
  - 4.5x6 6.5x9 9x 12 10x15 13x18 4.5x 10.7 6x 13 9x 18
  - For Krauss Actis Cameras : N° N° N° N° N° N° N° N°
  - Single dark slides, metal, black 401 403 404 406
  - Film pack adapter 411 413 414 416
  - Changing box, 12 plates (metal) Leather Case for camera with 6 dark 421 423 424 426
  - slides and I film pack adapter :
  - High or transverse model 431 433 434 433
  - Square model or square stereo model... 441 443 444 446
  - For the Krauss Takyr Cameras : Single dark slides, nickeled 451 452
  - Film pack adapter 453 454
  - Changing box, 12 plates (metal) Leather case for camera with 6 dark slides 455 456
  - and 1 film pack adapter 461 462
  - For the Lilliput Cameras : Single dark slides in case :
  - Set of three dark slides 471
  - Set of six dark slides 472
  - Changing box for 12 plates 473
  - Film pack adapter 474
  - For the Tykta Cameras :
  - Single dark slides, metal, black 481 483 484 486
  - Film pack adapter 491 493 494 496
  - Leather case for camera with 6 dark slides
  - and Film pack adapter 501 503 504 506
  - Container for Tykta Cameras Nos. II
  - and III 511 512
  - For the Mentor Cameras : 8x 10.5 12x 16.5
  - Double dark slide, wood 522 521 523 524 526 525 527 528
  - Filmpack adapter, wood 532 531 533 534 535 535 537 538
  - Changing box for 1 2 plates, wood 542 541 543 544 546 545 547 548
  - For the Ontoscopes : 4.5x 10.7
  - Changing box for 12 plates 581 582
  - — for roll films 583 584
  - Film pack adapter 585 586
  - Ground glass screen 587 588
  - Single dark slides, metal, black 589 590
  - Adapter for single dark slides... 591 592
  - For Gaumont Block-notes : 4.5 x 6
  - Set of 6 dark slides, nickeled, in case.... 60' 602 603 604
  - Nickel changing box for 12 plates Film pack adapter 605 608 606 609 607
  - For the Gaumont Spido and Stereo
  - Spido Cameras : 8x16
  - Double dark slides for Spido, wood 611 612 613 614 615
  - Changing box for 12 plates 622 623 624 625
  - — for 18 plates E. M Adapter for single dark slides, for wood 626
  - camera 627 628 629 630
  - Single dark slide, nickel 631 632 633 634
  - For the Leroy Cameras :
  - Filmpack adapter 635
  - Changing box 12 plates 636
  - For the Richard Veracope : Changing box for 12 plates 641 642
  - Roll film changing box 643 644
  - Adapter for single dark slides 645 646
  - Single dark slide, metal 647 648
  - For the Jeanneret Monobloc : Extra changing box 651
  - 2 Autochrome screens 652
  - Set of 4 carriers for autochrome plates... 653
  - Filmpack adapter 654
  - —
  - 53
- p.53 - vue 55/76
- - -—————£EJ<RAussJ8ET20JRuEDE2^^
  - SQUARE FIELD CAMERAS
  - These cameras are made of well seasoned wood, half polished walnut and mahogany, and admit of the use of lenses of large apertures as well as of doing exact work. The front and back are always parallel, excepting when the swing back is brought in operation.
  - The back is mounted on a travelling carriage moving directly upon racks with oblique teeth and enabling the camera to be used with short focus lenses. The motion is provided with a clamping button.
  - The bellows are square and made of leather. The lens panel has motions in three directions.
  - The frame for the slides rotates and can be set
  - for upright and transverse pictures, without disturbing the centring and the focussing.
  - The No. II Camera has a vertical swing motion and the No. III both horizontal and vertical swing motions.
  - The camera has two sockets with standard screw threads.
  - The equipment includes three double dark slides with sliding shutters, fitting the frame and locking in position.
  - For Plates 13x18 18x24 24x30 30x40 cm.
  - Longest extension Shortest extension...... 51 7.5 65 9 80 12 100 cm. 13 -
  - Weight 2.700 grm. 4.600 grm. 9.000 grm. 12.000 grm.
  - Panel motion : upward and downward to right and left 5 3 1/2 8 4 11 5 14 cm. 6 —
  - Prices Camera with three double dark slides with sliding shutters Price Codeword Price Codeword Price Codeword Price Codeword
  - Model No. II, mahogany. — No. II walnut dull polished — No. III, walnut dull polished Accessories : Double dark slide with sliding shutter, extra... Tripod stand, waxed beech Canvas case for the camera and three double dark slides Abada Abece Abeh Aca Apar Asac Abidi Abik Aced Apel Asef Abofo Abol Acif Apis Aseri Abugu Ahum Acolo Apog Asoss
  - 54
- p.54 - vue 56/76
- - E. Krauss, 18 ET 20, RUE de Naples, Paris
  - The " HELLE ” Projection
  - and Enlarging Apparatus
  - The body proper of the apparatus is made of cast iron and lacquered black. The front and back portions are connected by sliding tubes of nickeled brass and leather bellows. This affords an easy mean's of varying the camera extension and to fix it in any position with the aid of the wooden button at the side of the apparatus. When the extension has been thus clamped the picture can be focussed with the aid of a coarse-pitched screw, which is controlled by a button at the front of the apparatus. This device enables one to use lenses in standard mounts without the necessity of providing them with a rack or helix.
  - The lantern case is made of blued sheet metal. At the back and on either side it has large double-sided doors, which are opened and closed by fibre buttons. Either side door is fitted with a dark red window, through which the source of light can be watched. On the inside the lamp case is completely lined with asbestos sheeting, whereby the heating of the casing is reduced to a minimum.
  - The whole of the apparatus can be placed farther away and even removed entirely from the lantern for the purpose of ventilating the casing or for cleaning the condenser.
  - The condenser is of the usual type, being made up of two plano-convex lenses.
  - The slide carrier is held under the pressure of two springs to ensure it in a fixed position. The slide changer of wood with its to-and-fro motion accommodates quite a series of negative carriers of different sizes. A negative changing slide Can be substituted for the slide carrier for the purpose of making enlargements.
  - Each apparatus is supplied with a reciprocating slide changer and two negative carriers. Additional negative slide carriers are subject to an additional charge.
  - The “ Helle ” 12 X 9-cm. lantern has a condenser 16 cm. (6 3/8 in.) in diameter and a greatest extension of 32 cm. (12 3/4 in.) measured from the lens panel to the negative. The 18 X 13-cm. lantern has a condenser of 23 cm. (9 1/4 in.) in diameter and a greatest extension of 45 cm. (18 in.).
  - Codeword
  - Price of the " Helle ” 12 X 9-cm. apparatus with condenser and slide changer, but without lens and without source of light............................ Hellenar
  - Price of the " Helle ” 18 X 13-cm. apparatus with condenser and slide changer, but without lens and without source of light............................ Helletop
  - 55
- p.55 - vue 57/76
- - I I E. Krauss, 18 ET 20, Rue DE Naples, Paris * . ]
  - EXTENSIBLE ENLARGING CAMERA
  - This enlarging camera is made of waxed walnut and has extra strong metal bindings. The apparatus is made up of three bodies, of which the back section takes the plate or paper, the middle section the lens with the plunge shutter, and the front section the negative. The three sections are capable of a great axial displacement and are mutually connected by two bellows with soft
  - provided with a sliding shutter and takes plates as
  - leather corners.
  - In this apparatus the vertical or horizontal motion of the negative carrier admits of any particular portion of the negative being enlarged. The negative carrier can be placed in an upright or transverse position to suit the style of the picture.
  - The front section is hinged and can be folded down. The enlarging section is then available for use as an ordinary camera with long extension.
  - The ground glass screen is movable and serves for focussing. The dark slide is well as printing papers. At the back of the
  - lens the apparatus has an aluminium slide which serves as a shutter, and the lens panel is movable.
  - Every complete apparatus furnished with a lens is provided with two scales giving the enlarging ratios for the standard sizes.
  - In the table appended below (a) gives the extention of the ground glass screen, (b) the largest negative which can be enlarged, (c) the focus of the Krauss-Zeiss Protar lens Series V, F/18 with
  - which the apparatus is equipped. The price quoted is for the complete apparatus with its lens.
  - SIZE OF THE ENLARGING CHAMBER
  - 12x24 cm. 24x30 cm. 30x40 cm. 40x50 cm.
  - Model No. I without rack Dimensions Weight Codeword Model No. II with two racks and travelling carriage with Archimedian focussing screw. Dimensions Weight Codeword 24x31x9 cm 7 3/4 lbs. Agramo 24x31 x 10.5 cm. 10lbs. Agraltar 60 cm. 9x12 — 8.5 - 30x 37 x 10 cm. 12lbs. Agrados 30x37x11.5 cm. 14 1/2 lbs. Agrassus 72 cm. 11x15 — 11 - 37 x 47 x 11 cm. 161/2 lbs. Agrapa 37 x 47 x 12.5 cm. 18 3/4lbs. Agraffe 100 cm. 13x18 — 11 - 48 x 58 x 14.5 cm. 33 lbs. Agralette 150 cm. 18x24 — 18 —
  - Particulars of Models Nos. I and II (a) Length of extension.. • (b) For negatives up to (c) Focal length of lens. Protar F/18
  - 56
- p.56 - vue 58/76
- - 1 E. Krauss, 18 ET 20, Rue DE Naples, Paris I
  - PART III
  - BINOCULARS AND TELESCOPES
  - In the present catalogue we only propose to give an abridged survey of the various telescopic instruments made by us. A more detailed description of these instruments will be found in separate catalogues.
  - The entirely modern and highly perfected design of our instruments as well as the precision exercised in their manufacture and their superb finish have secured for them an enviable reputation. During the war our prism binoculars have given incontestable proof of their superior qualities, and in France our instruments were exclusively reserved for the use of the general staff, for the artillery and the aviation service. Our output in prism binoculars at present exceeds 125,000 instruments supplied to our private clientele and to the French Army as well as the Armies of Allies. We think we may fairly claim this to be the best proof of the quality and the established reputation of our products.
  - The prism binocular is now universally recognised as the only portable instrument which is adapted for serious observation from a distance and which combines the essential qualities of a large field, high magnification, and handiness.
  - By reason of these incontestable advantages the prism binoculars have gradually superseded the old draw binocular telescopes, and have taken their place by the side of the Galilean binoculars. It may be useful to emphasize in this connection that the prism binocular is, from its very nature a scientific instrument of precision and as such makes very exacting demands upon those engaged in its manufacture, so that none but perfectly made instruments are of any use. A prism binocular which is in the slightest degree defective in its construction or in the quality of its manufacture soon fatigues the eyes and yields worse images than a Galilean binocular of common quality. Hence where price enters rather predominantly into the question it is better to choose a good Galilean glass than a prism binocular of inferior quality.
  - Given instruments of the same optical type, the field of view varies very nearly inversely as the magnification. Either quality can only be given its maximum value at the expense of the other. In any instrument designed for a particular purpose the values of these two qualities require therefore to be brought into such relation that, a certain value having been attained for one quality in order to adapt the glass for a certain purpose, the other quality may still have a value which does not render the glass useless. This balance between the two leading qualities is adjusted in each class of our binoculars so as to adapt it for the particular purpose for which it is designed.
  - The light-transmitting quality varies inversely with the magnification, as does the size of the field of view, for an objective of a given diameter.
  - The Choice of a Binocular. To assist in the choice of a suitable glass the binoculars described in this catalogue may be grouped as follows, according to the various purposes for which their optical properties render them best suited : —
  - For travel, excursions, racing, and use in the country in general the glasses to be chosen from are the 6 X 24 mm., 7 X 24 mm., 8 X 24 mm., and 8 X 27 mm. binoculars.
  - Which of these four glasses is the one best suited to the user’s requirements depends upon his particular purpose and his personal predilection.
  - For hunting, use on board ship and night observations we recommend either the 6 X 30 mm. or the 8 X 40 mm. binocular, especially in dull weather.
  - For great distances (at sea, on duty, or on mountains) we advocate the use of the, 12 x 30 mm., the 12 X 40 mm. or 16 X 40 mm. binocular.
  - To complete the available choice we have added a theatre glass of a very compact design, the field of view of which is three times larger than that of the ordinary opera glass of the old Galilean type.
  - 57
- p.57 - vue 59/76
- - ------------------1 E. KRAUSS, 18 ET 20. RUE de Naples, Paris I-----------------------------
  - KRAUSS PRISM BIMOCULARS WITH ENHANCED STEREOSCOPIC EFFECT
  - Field, Excursion
  - Regulation artillery and engineers’ model
  - Nil—./ .‘!"‘ trmm
  - Noclo 8 X 27 mm.
  - Racing, Field
  - Regulation infantry and cavalry model
  - Noice-Noset-Novit 6 X 7 X 8 X 24 mm.
  - Hunting, Marine.
  - Regulation model for marine and aviation
  - Marine and anti-aircraft model
  - Nosic 6X30 mm, Long Distance
  - Mountain
  - Regulation model for heavy artillery
  - Nottze 12 X 30 mm.
  - Field Excursions
  - i Nuit-Neize
  - 8,16x 40mm.
  - Noctol 8X27 mm.
  - Monocto 8x27 mm.
  - 1
  - Teprim 3 X 13,5 mm.
  - Theatre
  - ao ^B» 1 (ratteens MBs #
  - T
  - 58
- p.58 - vue 60/76
- - —————--j^EJCRAUSSJ^nJOuE^^NAP^^
  - Prices and Particulars of the Krauss Prism Binoculars with Enhanced Stereospic Effect.
  - The prices quoted below are for binoculars with cord, black or tan solid leather case and shoulder strap. ,
  - Magnification Diameter of object glass Field c angular f view in yards per 1.000 yards Light transmitting capacity Coefficient of enhanced relief Dimer of bin Height isions ocular Width Weig Binocular ht of Case Price Codeword
  - mm. degrees y. cm. cm. grm. grm.
  - (a) Binoculars with individually focussing eyepieces (without twin focussing wheel).
  - 6 x 24 7°4 130 16 1.75 10 15 470 450 Noice |
  - 7 x 24 7010 124 12 1.75 10 15 470 450 No set
  - 8 x 24 7° 120 9 1.75 9.5 15 470 450 Novit
  - 8 x 27 607 116 12 1.75 11 15.5 570 500 Nocto
  - 6 x 30 805 150 25 2 11 16 610 500 Nosic
  - 8.3 x 40 603 113 23 2 16 17 800 500 Nuit
  - 12 x 30 3025 60 6.2 2 10 16 620 500 Nouze
  - 12 x 30 4° 70 10.9 2 16 17 780 500 Nella
  - 16 x 40 30 53 6.2 2 16 17 790 500 Neize
  - (6) B inoculars with Twin Foccusing Wheel.
  - (1)3 x 13.5 14° 243 20.25 6 9.5 200 50 Teprim
  - 8x 27 607 116 12 1.75 11 15.5 700 500 Noctol
  - 6x 30 805 150 25 2 11 16 740 550 Nosicol
  - (1) In solid rigid case with folding mirror.
  - Prism Monoculars
  - Being the detached component members of prism binoculars
  - Magnification............ 6x 6x 7x 8x 8x 8x 12x 12X 16x
  - Diam. of obj. glass.... 24 30 24 24 27 40 30 40 40 mm.
  - Codeword................ Monice Monsic Monoset Monite Monocto Monuit Monouze Monella Moneize
  - These Monoculars have all the optical qualities of our binoculars, but naturally they cannot produce any stereoscopic effect, neither can two monoculars subsequently be combined to form a binocular.
  - Accessories for the Krauss Prism Binoculars
  - Codeword
  - A.
  - B.
  - C.
  - D.
  - E.
  - F.
  - Rainguard, to protect the eyepieces from rain when the binocular is suspended from the neck....................................................
  - Parato Colado Pinco Trepado
  - Yellow Glasses for viewing glaring objects...............
  - Clamp for attaching the binoculars to a photographic tripod. • Tripod stand, of waxed beechwood, very substantial ,
  - Pye ( Our binoculars can be furnished with micrometers and double micrometer rtates ) deflecting range finding attachments for military use, respecting
  - Range Finding Prisms ( which we issue separate pamphlets.
  - 59
- p.59 - vue 61/76
- - E. Krauss, 18 ET 20, Rue de Naples, Paris
  - SUPERIOR THEATRE GLASSES
  - 11 Duchesse ” and t( Marquise ” Models «=§=» ^ ^
  - No. 274. — 1 3/8 in. Duchesse Style
  - No. 260. — 1 3/8 in. Duchesse Style
  - These glasses are manufactured with the utmost care and are furnished in two optical qualities, viz. superior optical quality and extra-superior optical quality. They are supplied in pliable morocco cases lined with satin and
  - fitted with a snap lock and handle.
  - No. 280. — 1 in. Marquise Style
  - DIAMETER OF OBJECT GLASS
  - Style No. Description 11W== 25 mm. Codeword 13W = 29 mm. Codeword 15W = 34 mm. Codeword 17W= 38 mm. Codeword 19W = 43 mm. Codeword
  - Duchesse ... Marquise ... 260 280 Brass mounts, covered with morocco, stitched; 1 slides, bridge-pieces, ( eyecups and rims lacquered black Babil Baton Babine Baum Babord Batir Bac Batac Bachar Barque
  - Duchesse .. . Marquise ... 274 283 Brass mounts , covered with white, goldsfish I coloured or black mother-of-pearl, giltslides gilt bridge-pieces, mother-of-pearl eye-cups, and gilt rims... Barbet Bellot Barbon Bemol Bard Bena
  - Duchesse ... Marquise .. . 262 285 Aluminium mounts, covered with stitched morocco leather, polished 1 slides, bridge-pieces, eyecups and rims - - . - Bachot Bercer Bacile Berg Badaud Berad Badige Berton Badin Berou
  - Duchesse ... Marquise ... 269 286 Aluminium mounts, covered with white, gold- I fish coloured or black ' mother-of-pearl, polished slides, bridge pieces, eyecups and rims Balcon Beren Balim Berpir Balzan Beramo
  - Additional cost of extra optical quality Ri... Ri... Ri... Ri... Ri...
  - 60
- p.60 - vue 62/76
- - E. Krauss, 18 ET 20, Rue de Naples, Paris
  - ALL-ROUND BINOCULARS
  - Krauss " Lilliput ” Pocket Binoculars, constructed in accordance with data furnished by the Artillery Practice Commission of Bourges.
  - No. 305. Marine Pattern long draws, superior optical quality, with buck-skin case and cord.
  - D. 23 mm., M. 3x; LF 100/1000. Weight of binocular with copper bodies, incl. case : 7 oz.
  - Krauss “ Argus " Binocular with extra bright field, as supplied in over 400,000 specimens to the French army, constabulary, and customs.
  - No. 357. Special Pattern, optically superior quality, in pliable case with shoulder strap.
  - D 43 mm., M. 3.3x; LF 113/1000;
  - Weight of the binocular with copper bodies, incl. case 21 oz.
  - Krauss “ Diana ” Hunting Glasses.
  - No. 360. Special pattern, tubular lens mount forming a sunshade, superior optical quality, buckskin case with snap lock and cord.
  - D. 29 mm., M. 3.2x, LF 120/1000;
  - Weight of binocular with copper bodies, incl. case 8 oz.
  - Krauss “ Cavalerie ” Field Glasses
  - No. 296. Marine Pattern long draws, solid leather case with shoulder strap and cord.
  - D. 29 mm., M. 3.5x, LF 86/1000;
  - Weight of binocular with copper bodies, incl. case : 13 1/2 oz.
  - Copper mounts, covered with morocco leather; black enamelled fittings
  - Polished aluminium body, covered with morocco leather
  - Lilliput ” Binocular
  - Codeword
  - Codeword
  - Bigot
  - Butin
  - Cadran
  - Beton
  - Blem
  - Butinal
  - Cagot
  - Bien
  - Explanation a D = Diameter of object glass,
  - M. = Magnification,
  - LF. = Linear field of view in yards at a distance of 1000 yards :
  - “ Argus Binocular
  - “ Diana ” Binocular
  - Cavalerie ” Binocular
  - 61
- p.61 - vue 63/76
- - - 1 E. Krauss, 18 et 20, Rue de Naples, Paris 1 ---
  - FIELD GLASSES
  - " Ordnance ” Binocular
  - Cosmos ” Binocular
  - Krauss " Ordnance ” Field Glasses, over 100,000 specimens of which have been supplied to the Russian army
  - No. 315. Marine Pattern long draws with sunshades, metal eyecups, in double sewn leather case, belt strap, shoulder strap, with swivel, D. 34 mm., superior optical quality; M.4x; LF 80/1000
  - Extra superior optical quality, M. 4.6 X; LF 70/1000....
  - Krauss , Cosmos ” Military Binocular.
  - No. 320. Conical Pattern, body and bridge pieces cast in one, of a high degree of rigidity. The bodies are covered with hardened and inalterable vulcanite, and the bridge pieces are hinged. The glasses are focussed by means of a central milled head. The eyecups are of a special flat-bottomed pattern. The tubular barrels are extended to form sunshades. The case is of sewn leather and fitted with belt strap and flat shoulder strap with two buttons.
  - D. 43 mm.; M. 4 X ;
  - LF 90/1000 ...............
  - Copper Bodies Aluminium Bodies
  - Codeword Codeword
  - Bluet Bout
  - Ribluet Ribout
  - — Comedie
  - Krauss High-grade “ Gallus ” Binocular.
  - The optical part of this binocular is made by our perfected methods and gives a clear and sharp image without iridescence. In order to take full advantage of the improved optical quality it was absolutely essential to provide the binocular with means for adjusting it to the distance between the eyes and to their ophthalmic anomalies. We have adopted for this purpose two well tried devices, viz. the hinge and independently focussing eyepieces, such as are used in our prism binoculars.
  - The “ Gallus ” Binocular is an excellent instrument for tourists, for hunting, racing, and can be used at night as well as in the day It is the binocular of the non-commissioned infantry or officer. It is covered with a species of vulcanite which perish or become detached. We make two models, .ely magnifying 5x and 6x, both having object glasses in diameter, and both are optical instruments of precision .
  - time
  - " Gallus ” Binocular
  - . 5X, LF. 108/1000
  - M. 6x, LF. 91/1000
  - Codeword
  - Gallice Gallum
  - Explanation a D. = Diameter of the object glass,
  - M. = Magnification,
  - LF. == Linear field in yards at a distance of 1000 yards.
  - 62
- p.62 - vue 64/76
- - E. Krauss, 18 ET 20, Rue de Naples, Paris
  - FIELD GLASSES
  - Krauss " Artillery ” Field Glass, for rapid focussing.
  - No. 323. Marine pattern long draws with tube slides affording protection from rain and direct sunlight. Metal eye cups, for high magnifications. In double sewn solid leather case with belt strap and sling with swivel. This model is much appreciated by reason of its automatic focussing device. D. 38 mm.
  - Sup. opt. qual. :
  - M. 4.5X; LF. 75/1000.........
  - Extra sup. opt. qual. :
  - M. 5.5X; LF. 60/1000...
  - Krauss " Federal " Field Glass for rapid focussing.
  - No. 321. Conical pattern, with extended tube ends forming sunshades and metal eyecups; giving high magnifications; in double-sewn solid leather case with belt strap and sling with swivel. D. 43 mm.
  - Sup. opt. quality :
  - M. 5.5X; LF. 65/1000....
  - Extra sup. opt. quality :
  - M. 6.5x. LF. 50/1000....
  - D. 38 mm. Sup. opt. quality :
  - M. 4X; LF. 80/1000...........
  - Extra sup. opt. qual. : M.5X; LF. 65/1000..............
  - Krauss " Invincible ” Battery Glass.
  - No. I. High Model, for high magnifications.
  - No. II. Low Model, for a large field of view.
  - Marine pattern with tube slide extensions affording protection from rain and direct sunlight; with metal eye cups; in double sewn solid leather case with belt strap with two swivels.
  - No. I. High Model.
  - D. 43 mm. No. 330.
  - Sup. opt. quality :
  - M. 4X; LF. 75/1000...........
  - Extra sup. opt. quality :
  - M. 5X; LF. 70/1000...........
  - No. 1. High Model.
  - D. 47 mm.; No. 334.
  - Sup. opt. quality :
  - M. 5X; LF. 60/1000...........
  - Extra sup. opt. quality :
  - M. 6X; LF. 50/1000...........
  - No. II. Low Model. D. 47 mm. No. 336.
  - Sup. opt. quality :
  - M. 4.5X; LF. 80/1000....
  - Extra sup. opt. quality :
  - M. 5x; LF. 75/1000...........
  - Explanation a 1
  - Brass bodies covered with morocco, black enamelled fittings
  - Aluminium bodies cc-vered with morocco; polished fittings
  - Codeword
  - Bras
  - Ribras
  - Brand
  - Ribrand
  - Bramer
  - Ribramer
  - B riset
  - Ribriset
  - Brocol
  - Ribrocol
  - Bronz
  - Ribronz
  - Code-word
  - Brin
  - Rihrin
  - Branor
  - Ribramcr
  - Branel
  - Ribranel
  - Broc
  - Ribroc
  - Brodel
  - Ribrodel
  - Bronet
  - Ribronet
  - Artillery Field Glass
  - “ Federal ” Field Glass
  - — dr
  - Invincible Field Glass
  - D. = Diameter of object glass; M. = Magnification, LF. = Linear field in yards at a distance of 1000 yards.
  - 63
- p.63 - vue 65/76
- - ------------------- E. Krauss, 18 ET 20, Rue de Naples, Paris --------------------
  - ‘ Thalattoscope ” Binocular Low Model
  - MARINE GLASSES
  - " Naval ” Binocular, High Model
  - Krauss " Pilot " Binocular
  - Krauss " Thalattoscope " Binocular.
  - No. I. High Model, for high magnifications;
  - No. II. Low Model for a large field of view.
  - Marine pattern with extensible tube slides affording protection from rain and direct sunlight; curved bridge pieces with eyelets for shoulder slings; metal eyecups; in double sewn solid leather case, with belt strap and sling with two swivels.
  - No. 345. High Model.
  - D. 57 mm. Sup. opt. quality : M. 5X; LF. 70/1000.........
  - Extra sup. opt. quality :
  - M. 5.5 X; LF. 65/1000... No. 351. Low Model.
  - D. 57 mm. Sup. opt. quality : M. 4x; LF. 85/1000....
  - Extra sup. opt. quality :
  - M. 4.6x; LF. 80/1000....
  - Krauss " Naval ” Binocular
  - No. I. High Model, for high magnifications.
  - No. II. Low Model, for a large field of view.
  - Aluminium mount, black enamelled, metal eyecups, marine pattern with tube slide affording protection from rain and direct sunlight, bridge pieces with eyelets for sling, supplied in double sewn solid leather case with belt strap and sling with two swivel fasteners.
  - No. 350. High Model.
  - D. 59 mm. Sup. opt. quality :
  - M. 6x; LF. 75/1000.........
  - Extra sup. opt. quality :
  - M. 6.5 X; LF. 70/1000.... No. 354. Low Model.
  - D.59 mm. Sup. opt. quality : M.3.6x;LF. 105/1000....
  - Extra sup. opt. quality :
  - M. 3.7X; LF. 100/1000..
  - Krauss " Pilot ” Binocular. No. 355. Low Model, with metal eyecups, tubular extended lens mounts forming sunshades, in stitched solid leather case with belt strap. D. 54 mm.
  - Sup. opt. quality :
  - M. 3x. LF. 120/1000.......
  - Extra sup. opt. quality :
  - M. 3.2X; LF. 115/1000..
  - Brass bodies covered with morocco, black enamelled fittings
  - Bruir
  - Ribruir
  - Bufet
  - Ribufet
  - Pilot
  - Ripilot
  - Aluminium bodies covered with morocco; polished fittings
  - Bruit
  - Ribruit
  - Buglos
  - Ribuglos
  - Buch
  - Ribuch
  - Busar
  - Ribusar
  - Pilotal
  - Ripilotal
  - Explanation a D. — Diameter of the object glass; M. = Magnification. EF. = Linear field in yards at a distance of 1000 yards.
  - 64
- p.64 - vue 66/76
- - i E. Krauss, 18 ET 20, Rue de Naples, Paris — -------------—
  - KRAUSS MONOCULAR PRISM TELESCOPE
  - Advantages :1 The instrument is conveniently portable; it gives an erect and unreversed view; thefmag-nification can be rapidly changed, and the field of view is both very large and sharply defined, thanks to the nature and quality of the optical constituents.
  - This type has been adopted by the French [artillery as a battery telescope.
  - The Monocular Prism Telescope may be supplied either with a single eyepiece magnifying 15 X or 23 X or
  - 30x, or it may be equipped
  - with three eyepieces on a revolving changer fitted to the prism casing, by means of which the magnification, the extent of the field of view, and the brightness can be adapted to the observational requirements.
  - D. 75 mm.; M. 15 x, 23 x and 30x; LF. 50/1000, 36/1000, 27/1000.
  - Codeword
  - Monocular Prism Telescope with three magnifications, with leather case.............. Trilob
  - Ditto, with one magnification................................................................. Mobil
  - Tripod Stand F affording a means of moving the telescope in azimuth and altitude ....................................................................... Pif
  - KRAUSS PRISM BINOCULAR TELESCOPES
  - In instruments designed for observations at a distance stereoscopic vision is now fully recognised to be of immense advantage. It is obtained by placing the objectives farther apart than the eyepieces. Our binocular prism telescopes, in which the objectives are separated by a distance of 70 cm. (28 inches), when extended into their horizontal position, enable one to distinguish differences of depth with great precision and to see objects which are not disclosed by a monocular instrument or by a prism binocular of the ordinary type.
  - When mounted on a stand, the instrument can be swung into any position relatively to the hinge connecting the two telescopes and the vertical axis of the combined telescopes. For the later purpose the stockhead is provided with a tangent screw. The two telescopes can be turned about the hinge into a horizontal position on a level with the eyes of the observer. In this position the stereoscopic effect reaches its greatest value. On the other hand, the two telescopes may be turned in scissor fashion vertically up above the head of the observer, in which case the stereoscopic effect has its least value, but in this position of the telescope arms the observer can conceal himself behind an obstacle and observe from behind the shelter so afforded, since the objectives alone reach above the obstacle.
  - The two eyepieces have movable eyecups with diopter scales, by means of which they may be adjusted to suit the ophthalmic anomalies of the eyes.
  - Particulars
  - Magnification Diameter of the 12x .
  - objectives .. Diameter of the 51 mm.
  - exit pupil........ 4.25 mm.
  - Light-transmitting capacity.......... 18
  - Angular field of view 4° Linear field of view inyds.per 1000yds. 67 Specific relief effect.
  - Total relief effect.. 132
  - Weight, excl. of case. 11 lbs.
  - o’
  - 11
  - Codeword
  - The Binocular Prism Telescope supplied in a leather case (excl. of tripod stand)..................:................................................... Cisob
  - Tripod Stand, for shear-jointed binocular telescope, in canvas case............... Pif
  - 65
- p.65 - vue 67/76
- - ——— --------------1 E. KRAUSS, 18 ET 20, Rue de Naples, Paris
  - HAND TELESCOPES
  - N° 462/463/467. — Achromatic Hand Telescopes, with three draws, in polished brass, body covered with stitched leather.
  - N°. 470/471. Tourist’s Hand Telescopes, with four draws, in oxydised brass, body covered with morocco, end caps to cover the object glasses and eyepieces, the whole then forming a sling case.
  - N°. 474. Tapering Military Hand Telescope with variable magnification.
  - 3
  - This telescope has a tapering body covered with morocco, sewn flat down, with end caps and shoulder strap of dull leather. Pancratic eyepiece with small graduated draw for varying the magnification at pleasure. The telescope has two draws, in blue oxydised brass.
  - N° 483. Marine and Military High-grade Hand Telescope. This model has been used with great success in the Russian, Japanese and Argentinian navies and armies.
  - The body is cylindrical; it has one draw and is covered with stitched morocco leather. The object glass is provided with a cap and the eyepiece is fitted with a pivoted shutter. This telescope is made of nickel-silver throughout to guard against corrosion by sea air.
  - Diameter LENGTH
  - No Description of the object Magni- - Codeword
  - glass fication Closed Extended
  - mm.
  - 462. Achromatic HandTe- 17 22 25 Lacto Lada Lafu
  - lescope, three draws, polished brass, without sunshade.... i 31 36 43 15 20 25 44 60 75
  - 31 15 17 44 Relacto
  - 463. Ditto, with sunshade. 36 20 22 60 Relada
  - 467. 43 25 25 75 Relafu
  - Ditto, with pancratic! 36 25 to 40 23 60 Palada
  - eyepiece (for va- 30 to 50 25 80 Palafu
  - riable magnification) 50 35 to 60 26 95 Palaga
  - 470 Tourist’s Hand Te- 31 15 17 44 Latour
  - lescope with four draws, oxydised brass 36 43 50 20 25 30 19 21 25 55 70 85 Latas Latef Latog
  - 56 35 29 90 Laturn
  - 471. Ditto, with pancratic eyepiece (with variable magnification)/ 36 43 50 56 20 to 30 25 to 37 39 to 40 35 to 50 20 22 26 28 55 70 85 91 Palatas Paladef Palatog Palatum
  - 474. Military Hand Te-lescope pancratic, 54 17 to 27 32 82 Military
  - with two draws....
  - 483. Marine Hand Te-
  - lescope “ Cadet Model, of nickel-sil- 32 15 42 57 Cadet
  - ver, with one draw.
  - 65
- p.66 - vue 68/76
- - ---------------LI E. Krauss, 18 ET 20, Rue de Naples, PARIS 1-----------------------
  - Stand VIII
  - PART IV
  - MICROSCOPES AND ACCESSORIES
  - MICROSCOPE FOR TECHNICAL PURPOSES
  - For the examination of paper, wool and silk, etc.; for examining dust’and sediments; for testing meat and foodstuffs in general.
  - Stand VIII
  - With long radial overhang of the tube, the upper body being shaped to serve as a handle. The coarse movement is effected by rack and pinion. The stage is rectangular, measuring 100x90 mm. It is fitted with a wheel disphragm and a concave mirror. The objective is a separable combination and, with eyepiece No. III, gives magnifications 30 X, 100 X and 230 X.
  - The instrument is supplied in a wooden case.
  - Codeword..................................., Dagelomis.
  - STUDENTS’ MICROSCOPES
  - Stand VII.
  - The coarse movement is by rack and pinion, the slow movement is produced by a lever actuated by a micrometer screw.
  - The upper body has been given a bold sweep, which renders
  - it incidentally convenient as a handle.
  - several respects.
  - The design is novel in
  - The instrument is provided with a plane and a
  - concave mirror capable of giving oblique illumination. Circular stage of a diameter of 105 mm.
  - This instrument is specially recommended for the study of animal and vegetable anatomy and histology. It is eminently well adapted for the purposes of students of pharmacology and medicine.
  - The equipment includes two achromatic objectives Nos. 3 and 7a, a double revolving nosepiece, two Huygens eyepieces Nos. II and IV (Magnifications 40 to 650x). The whole supplied in a case. Codeword : Septimo.
  - Stand VI
  - Stand VII
  - Same model, but with Abbe condenser B2 (num. ap. 1.20) with iris-diaphragm.
  - The equipment includes : Three achromatic objectives Nos. 3,7\and 1 80 (1 /12” oil-immersion),
  - $ , 5
  - I Co I
  - ' 3 ch.
  - Stand VII
  - triple revolving nosepiece, two eyepieces Nos. II and IV (Magnifications 40 to 1200x). The whole supplied in a wooden case.
  - Codeword ...................................... Septuto.
  - Students’ Stand VI6
  - This stand can be inclined at an angle of 45°. It is focussed by rack and pinion and micrometer screw. The fixed circular stage has a diameter of 105 mm. and is fitted with a wheel diaphragm. The equipment includes two achromatic objectives Nos. 3 and 7a, a double nosepiece, two Huygens eyepieces Nos. II and IV, and a wooden case (Magnifications
  - 40 tO 650x). r
  - Codeword..
  - Stand VI
  - Senugarol.
  - Same model, but with Abbe condenser B1 (num. ap. 1.20), with side screw and iris-diaphragm. The equipment includes three achromatic objectives Nos. 3, 7a and 18b (1/12” oil- immersion), triple revolving nosepiece, two Huygens eyepieces Nos. II and IV, and a wooden case
  - Magnifications 40 to 1200 x).
  - Codeword : Senora.
  - 67
- p.67 - vue 69/76
- - -i E. Krauss, 18 ET 20, Rue de Naples, Paris 1----------------------
  - LABORATORY MICROSCOPES
  - For laboratory work we recommend in preference the following two optical equipments
  - I. The so-called " Pasteur- Koch ” Combination, consisting of — a revolving nosepiece for three objectives, three achromatic objectives Nos. 3, 7a and 18b (1/12” oil-immersion), two Huygens eyepieces Nos. II and IV. Magnifications 40 to 1200.
  - Codeword ............................................................ Combapko
  - II. The so-called " Abbe ” Combination, consisting of — a revolving nosepiece for four objectives, four apochromatic objectives of foc. 1. : 16, 8, 4, 2 mm. (oil-immersion num. ap. 1. 30), six compensating eyepieces Nos. 2, 4, 6 (with micrometer), 8, 12, and 18.
  - (Magnifications 30 to 3000 x). Codeword............................ Combabbe
  - The " Pasteur-Koch ” Combination is the one most generally to be recommended for bacteriological laboratory research, for practical medical and pharmaceutical work, etc. It is also well adapted for technical purposes, for use in breweries, for the study of ferments, etc. For certain very intricate investigations it is necessary to have recourse to the “ Abbe ” Combination, which is essentially made up of apochromatic objectives and compensating eyepieces.
  - Below we append an abridged summary of the different microscope stands which may be equipped with one or the other of the above optical combinations. We need scarcely say that we shall be pleased to advise on the selection of other combinations better adapted for specia stated requirements. For fuller information regardin microscopes we would refer our readers to our Catalogue of Microscopes.
  - Stand B IF
  - Stand C3
  - Microscopes for Bacteriological Investigations.
  - Stand C5 (small model), inclinable, coarse rack and pinion motion, micrometer screw slow motion, circular revolving stage 105 mm. in diameter capable of being •centred by means of two screws, Abbe condenser B1 (n. ap. 1.20) with side screw and iris-diaphragm. With the Pasteur-Koch optical equipment, in case.
  - Codeword................................ Cedaros.
  - Stand C1, similar to the preceding microscope but with fixed circular stage, Abbe condenser B2 (n. ap. 1.20) without side screw. With the Pasteur-Koch optical equipment. Codeword.................... Cegamis.
  - Stand B II2 (medium sized), inclinable, coarse rack -and pinion motion, slow motion by a lateral micrometer screw, circular revolving stage capable of being centred by means of two screws, Abbe condenser B1 (n. ap. 1. 20) with side screw and iris-diaphragm. With Pasteur-Koch
  - optical equipment and case. Codeword... • Bussarol
  - 68
- p.68 - vue 70/76
- - -----------------1 E. Krauss, 18 ET 20, Rue de Naples, PARIS I----------------------
  - Stand B II3. Similar to the preceding, but with a square stage with vulcanite lining. With
  - KRAUSS
  - Stand S A I
  - Pasteur-Koch optical equipment.
  - Codeword........................... Butora.
  - Stand B II4. Similar stand, but with fixed circular stage. Same optical equipment.
  - Codeword.......................... Butosina.
  - Stand B I1 (Large Model), inclinable, rack and pinion coarse motion, slow motion by means of a lateral micrometer screw bearing a drum divided into 100 parts (each division reading 0.002 mm.). Its construction ensures the safety of the front lens of the objective. The revolving circular stage has a diameter of 110 mm. and can be centred by means of two screws. Large Abbe condenser A1"2 (n. ap. 1. 20) with iris-diaphragm with lateral motion, and cylinder diaphragm. With the Pasteur-Koch optical equipment, in case.
  - Codeword........................... Besana.
  - Stand B I2. Same model, but with Abbe condenser A1-3, with additional domed iris-diaphragm, swing-out condenser. With Pasteur-Koch optical equipment.
  - Codeword........................... Besoni.
  - With Abbe optical equipment.
  - Codeword........................ Besabbe.
  - Stand A I1, large universal model with large tube of a
  - diameter of 50 mm., specially adapted for photo-micrography. Large circular revolving and centring stage 120 mm. in diameter. 1 ransverse lateral micrometer screw with drum divided into 100 parts (1 division = 0.002 mm.). Large Abbe condenser A1-3 with iris-diaphragm capable of lateral displacement, hinged condenser, additional domed iris-diaphragm. With “ Abbe optical equipment, in case. Codeword............... Albacabbe.
  - With “ Pasteur-Koch ” optical equipment.
  - Codeword......................... Albalong.
  - Large Monocular Stereoscopic Stand S. A. I.
  - A new design, similar in size and detail to Stand A. I, to which, however, has been added a stereoscopic arrangement which admits of viewing a preparation under all magnifications either with a single eyepiece (the image then being flat) or with two eyepieces (the image then appearing in relief). The transition from either mode of observation to the other can be made instantly by means of an ingenious device and without the necessity of removing the tube in order to replace it by another. The stereoscopic device can be withdrawn and employed by itself as a stereoscopic magnifier or on another micro-scope, thus transforming it into a binocular microscope. This attachment is supplied with a pair of eyepieces No. IV. With Abbe optical equipment, including a stereo pair of No. 12 compensating eyepieces.
  - Codeword.............................. Stealable.
  - With Pasteur-Koch optical equipment.
  - Codeword............................... Stealpako.
  - Mechanical stage : Codeword.
  - No. 100 for Stands A I and S A I...... Plataram.
  - No. 101a - B I, B I I, C.......... Platast.
  - No. 105 for all other stands.......... Platus.
  - Stand A I
  - ‘s
  - E. KRAUSS PARIS1
  - 69
- p.69 - vue 71/76
- - -=======E. KRAUSS, 18 ET 20, RUE DE NAPLES, PARIS K-------------
  - STEREO-BINOCULAR MICROSCOPES
  - L 150 L 155 L 175
  - II
  - L 150. Greenough Binocular Microscope, consisting of two microscope bodies having their axes mutually inclined and fitted with a Porro prism combination. This, in conjunction with two objectives and two paired eyepieces, produces a very pronounced stereoscopic effect, The two prism casings can be set to the distance between the eyes within a range of 55 to 77 mm.
  - Codeword..................................................... Sterear.
  - L 155. Same Model, the upper portion being, however, so arranged that it can be removed from the foot in order to be placed directly upon large objects to be examined (Dermatoscope). Codeword....................................................... Sterearar.
  - L 175. Aquarium Microscope, consisting of the upper portion of a Greenough microscope which is mounted upon a heavy base fitted with devices by which it can be freely passed over a large surface so that objects of any shape or size can be viewed from all sides.
  - Codeword..................................................... Stereacar.
  - Suitable Optical Equipments for the Binocular Microscopes L 150-155 and 175.
  - I. For Aquarium Work :
  - 1 pair of objectives, F =40 mm.
  - 1 pair of eyepieces Nos. II, Magnification 27 X. Codeword-. Algaba.
  - II. For Dissection:
  - a) Two pairs of objectives 30 and 50 mm. focus,
  - Two pairs of eyepieces Nos. II and IV. Magnifications 18 X 27 X 38 X 60 X. Codeword Algira. b) Two pairs of objectives 40 and 60 mm. focus,
  - Two pairs of eyepieces Nos. III and V. Magnifications 10 X 19 X 35 X 62 X.
  - Codeword ........................................................ Algusa.
  - 70
- p.70 - vue 72/76
- - E. Krauss, 18 ET 20, RUE de Naples, Paris !
  - STEREOSCOPIC ATTACHMENT
  - (Ess
  - Ultra
  - This device instantly transforms an ordinary microscope into a single-objective binocular by simply removing the eyepiece in use and replacing it by this attachment. The instrument is supplied together with a pair of eyepieces No. IV, in case.
  - No. 208. Codeword : Sterad.
  - This device can be used as a stereoscopic lens magnifying 12 X mounted on a stand with motions in all directions (see annexed figure).
  - Movable Stand No. 209. Codeword : Sterunt.
  - Microscopy
  - The dark-ground condenser furnishes an excellent illumination, given, of course, a sufficiently intense source of light, and brings into view bacteria, which may thus bestudied in all their movements. The ordinary diaphragms of the immersion lenses as well as those of the high-power dry lenses require to be replaced by special conical stops.
  - Our flat condensers F, Fb and FC are adaptable to any microscope stand. The conical condenser Fa is designed for use with our instruments only.
  - Flat Condensers :
  - No. 701. Model F. Two arms fitted with pressure screws admit of the condenser being accurately centred. In case.
  - Codeword : Ultrabidal.
  - No. 703. Model Fb. A circular wheel diaphragm contains four stops of different diameters, by means of which the intensity of the illumination can be varied to suit the objectives employed, a converging lens for illumination transparent objects, and a
  - ground glass. A spring catch arrests the wheel in each of its six positions.
  - With the aid of this condenser arrangement a rapid transition can be made from observation on a dark ground to that with transmitted light. The apparatus is supplied in a case.
  - Codeword : Ultrabino.
  - No. 713. Universal Model Fb, identical with No. 703, but combined with a mechanical stage with ranges of motion of 30 mm. and 50 mm. Codeword : Ultrabetit.
  - No. 704. Model Fc. Same as Fb, but with iris-diaphragm for observation with transmitted light. Codeword : Ultrabogar.
  - No. 702. Conical Condenser, Model Fa, fitting the sliding sleeve of the Abbe condenser, incase. Codeword: Ultrabeta.
  - No. 716. Electric “ Starr ” Lamp with converging lens, with switch, designed for half-watt lamps. Codeword : Starr,
  - No. 723. " Lilliput ” Arc Lamp, with carbons set at right angles to one’another, with hand feed, operating at 50 volts and 4 to 5 amperes. Codeword : Ultramen,
  - 71
- p.71 - vue 73/76
- - -============== E. KRAUSS, 18 ET 20, RUE DE NAPLES, PARIS =======
  - PHOTO-MICROGRAPHIC APPARATUS
  - on
  - I. Horizontal and.Vertical Photo-micrographic apparatus.
  - F. 386. Photo-micrographic Apparatus which can be used both in the horizontal and vertical position; slide bar 75 cm. (30 in.) long; ground and plain glass focussing screens; 18x 13-cm. (7 2 x 5-in.) dark slides with 12x9-cm. (4 1/4x3 1/4 in.) plate carriers; Hooke’s key for focussing from a distance.
  - Codeword
  - Vertusi.
  - Connecting sleeve F 384 fitting Microscope AI............................... Corona or Connecting sleeve F 383 fitting the usual forms of microscopes.......... Couro. Optical bench F 387, for the accommodation of all the accessories, which thus remain permanently centred with respect to the optic axis.................. Optiban Converging lens with iris-diaphragm F 391a on saddle stand, for use with micro objectives and eyepieces.................................... Beliris.
  - Two Troughs for coloured filter liquids, on saddle stand, F 394............. Cave.
  - Condenser F 397 for “ dry ” lenses (Nos. 0 to 3)............................ Brilli.
  - Periscopic Mirror F 387a for use with the vertical camera................... Mirperi.
  - Focussing Lens F 396 with movable arm....................................... Enstellar.
  - Equipment No. I, complete................................................... Micrun.
  - II. Vertical Photo-micrographic Apparatus.
  - F. 385. Photo-micrographic Camera, slide bar 75 cm. (30 inches) long, mounted upon a very rigid cast iron base; with a double dark slide for 18x 13 cm. and 12x9 cm. plates; a ground glass and a plain glass focussing screen
  - Codeword
  - Verticar.
  - Metal connecting sleeve F 383......................................... Couro.
  - or Metal Connecting sleeve F 384...................................... Corona.
  - Converging Lens with iris-diaphragm F 391a, on saddle stand........... Beliris.
  - Long-focus Condenser F 397............................................ Brilli
  - Equipment No II, complete ............................................. Microde
  - Optional Accessories :
  - Mirror for observation at a distance from the ground glass focussing screen F 3870.................
  - Extra double dark slide F 391 for 18x 13-cm. and 12x 9-cm. plates..........
  - Condenser F 397 ........................................ 1
  - Converging Lens F 392a on hinged saddle stand.... I for photo-micro-
  - Micro Planar F/4.5, f == 20 mm.................... ) graphy with pho-— F/4.5, f — 35 mm . 2 tographic Planar
  - Micro-Tessar F/4.5, f = 50 mm.................... [ and Tessar lenses
  - — F/4.5, f = 75 mm.................... \
  - Lilliput Arc Lamp No. 723a with hand feed, with two Hooke’s keys...............
  - Resistance (please state voltage)..............................................
  - No. 727 for 110 volts.
  - No. 728 for 220 volts.
  - Mirdep. Cassette.
  - Brillisi Lentaste.
  - Pal.
  - Paladin. Ther let. These. Ultramenes. Rheostat.
  - 72
- p.72 - vue 74/76
- p.n.n. - vue 75/76
- - IMP. DE MONTLIGEON (ORNE) 14529-12-24
- p.n.n. - vue 76/76