Additional information on

RF-Nikkor-H 1:2.5 f=18cm (180mm f/2.5)
fast speed Telephoto lens for Nikon S-Mount Rangefinder cameras

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Contax Carl Zeiss JENA 180mm f/6.3  Tele-Tessar telephoto lens in Contax RF mount All chrome version of the older version of the original Contax Carl Zeiss JENA 180mm f/2.8 Olympia Sonnar  by Kelvin Li from gokelvincameras@EBAY
The Sonnar design was was an artful optical invention by Dr. Ludwig Bertele which was still remained as a benchmark design in optical history. The first Sonnar lens for 35mm photography was believed to be specifically designed for the Zeiss Ikon Contax I* back in 1932. The name "Olympia Sonnar" was deprived from a telephoto lens with a classic Sonnar design, introduced for photographers covering the Berlin Olympic Games** during Hitler reigned Germany in 1936. The fast speed telephoto lens has a rather colorful background which was fueled by the speculative relation with the controversial German lady video/photographer LENI RIEFENSTAHL (1902~2003). All these stuffs had many people affectionately referred it as "Olympia Sonnar" and it has been officially renamed in such a way by respective creator(s) at later stages.
Credit: Image at this very old chrome version of the 180mm Olympia Sonnar courtesy of Mr. Kelvin Li from his popular gokelvincameras @ Ebay Store which retails for many hard-to-find Nikon, canon, Contax oldies. Image Copyright © 2003. All rights reserved. * Some termed the Kine-Exakta, 1936. ** This source said it was for the Winter Olympic at Garmisch-Partenkirchen. *** Zeiss Jena version 180mm f/2.8 Sonnar for Exakta. **** Picture profile on Carl Zeiss JENA Tele-Tessar 180mm f/6.3, courtesy of Leica Shop.
Ref. extracted from Alexander Lee's article on the SONNAR 1930 / Dr. Ludwig Bertele:- Zeiss:- Ernemann Company was taken over by the Zeiss-Ikon combine, and shortly in 1930, Ludwig Bertele started the design of the Sonnar type lens based on the second (f/1.8) Ernostar type. It was completed in 1931, and was a f/2 Sonnar. The Sonnar negative triplet consisted of a high-index outside and a lower-index element between. In 1932, he released a f/1.5 version with a strong cemented interface on the rear component. This allowed correction on the higher-order spherical aberration which was needed in a lens of the high aperture. The name Sonnar had been used previously by the Contessa Company for a camera with a Tessar type lens, but as Zeiss-Ikon absorbed Contessa, they acquired rights to the name. The design uses less elements than Planar, so when coating tech was primitive, the lens had much less flare due to less surfaces in design. Simpler than Planar, smaller and comparatively inexpensive ... " Credit: -Alexander Lee - .

Leica Ernst Leitz Wetzlar TELYT f=20cm 1:4.5 (200mm f/4.5) Visoflex version
Leica also has a fast lens speed version, released in 1965 as TELE-Elmarit 180mm f/2.8 which was designed as a Visoflex (Early model named PLOOT) telephoto lens. It is extremely rare because only approx. 250 units were being produced. An alternate, more affordable version (Visoflex) was the TELYT 20cm f/4.5 - being the model made available for Leica users between 1935~1960 (the TELYT-V was an upgrade to this, which was sold between 1959~1984). Subsequent TELE-Elmarit lenses (EBAY LINK SEARCH) are primarily either R or M-Mount (but Not Visoflex-specific) Leica lenses.

Other GOOD web resources for Contax/Leica:-
Leica user group on
TELE-Elmarit 180mm f/2.8 Visoflex version; German EXCELLENT page at taunusreiter; Contarex by Zeiss Ikon; another interesting M42 Screw Mount (1978) Carl Zeiss Jena DDR Sonnar auto 200mm f/2.80MC ; Captain Jack's Carl Zeiss Jena Exakta Lenses; a beautifully constructed Japanese site on Zeiss/Exakta; Cameraquest/Stephen Gandy on the 180mm Olympia Sonnar (good read); Photonet discussion board;

I have presented a brief account of the Carl Zeiss 18cm f/2.8 Olympia Sonnar as well as some basic info on the Leica options earlier as introductory on this Nikkor page because German equivalent had one way of another, a close relationship with the Nikon version - both optically# as well as event/happening occurred in the market place. First of all, introduction of the Nikon Reflex Housing back in the early '50 had actually opened up a new chapter for the Nikon rangefinder system. It was no secret that during the early days, the mighty German optical industry which were so dominant in the market was the Japanese imitating target. As a whole, basic system architecture and road map for further development in the budding Japanese optical industry had the established German framework to replicate. So when Carl Zeiss JENA introduced two killer long telephoto lenses 180mm f/2.8 Olympia Sonnar (& the 300/f4) in 1952, Nikon just had to counter-react the German initiative with a slightly faster f/2.5 maximum aperture equivalent spec lens to safeguard their interest as the S-mount Rangefinder system was still largely at its infancy. The RF Nikkor-H 1:2.5 f=18cm (180mm f/2.5) telephoto lens was released just barely a year after the Olympia Sonnar 180/2.8's debut. At the time of its introduction, it was once regarded as world's fastest telephoto lens and this "new" inclusion in the RF Nikkor lens family had been used throughout for Nikon marketing campaign in rebranding a new image for the Nikon bayonet mount S-series system. In fact, other than the 1951's RF Nikkor 8.5cm f/1.5 - for the first time, the RF Nikkor telephoto lens group finally had another fast lens speed telephoto lens to serve professional photographers. Along with another two exotic super telephoto/Mirror lens (RF 50cm f/5.0 (1955) / RF Reflex Nikkor 100cm f/6.3 (06.1959); the Japanese maker was beginning to emerge as a respectable force to begin attacking the professional users market. The entire event was further aided with a excellently crafted, pro-calibre Nikon SP rangefinder camera in 1957. After the mid '50, the expanded RF Nikkor long telephoto lens group was considered good enough both optical and mechanically to cater for needs of professional sports, news photographers as well as photojournalists worldwide.

Manual Focus 2 parts Telephoto lens with Focusing Unit Manual Focus Nikkor 180mm f/2.8 (non ED version) Manual Focus non ED version, Nikkor 300mm f/2.8 1971

Nikon N-F Tuve / adapter

* Note: N-F Tube is a device designed by Nikon which was released during the early '60, it was specifically for adapting older rangefinder Nikkor lenses onto the reflex F bodies. It was an interim product to bridge the transition of lenses from rangefinder to reflex format.
NOTE:- It was equally interesting to note that even after the reflex Nikon F was introduced in 1959, the early Nikkor lens group for the reflex Nikon still lacked a fast speed telephoto. So, where it stretched until the the release of the two parts MF AUTO Nikkor 600mm f/5.6 (08.1964), 180mm f/2.8 AUTO Nikkor (1970), MF Nikkor 300mm f/2.8 (1971) - the RF Nikkor-H 1:2.5 f=18cm (180mm f/2.5) had remained as the fastest Nikkor telephoto lens available. Using the Rangefinder Nikkor lens onto the reflex Nikon bodies (Nikon F and Nikkormats) was made possible via a N-F Tube / converter. See an example of such a combination below:-

Nikon F2 with a rare Rangefinder (RF) Nikkor 180mm f/2.5 (f=18cm 1:2.5) telephoto lens attched via Nikon N-F Tube
<<<--- A rare combination in a Nikon F2 with N/F Tube setup, and mounted on with an RF Nikkor 180mm f/2.5 telephoto lens w/ HN-10 metal lens hood.

Credit: Image of this Nikkor-H 18cm F/2.5 lens Copyright © 2003. Simon Pulman-Jones® <> All Rights Reserved. Please respect the visual property of the photo contributor.

NOTE: For a quick explanation on PRESET mechanism where it relates.

Nikon (Nippon Kogaku K.K.) RF Nikkor-H 1:2.5 f=18cm (180mm f/2.5) fast speed telephoto lens for Nikon Bayonet S-Mount Rangefinder cameras Year Introduced: Nov.1953 #; Discontinued: probably in 1963

Personally, I think Nikon had two very interesting designing concept that related to their development of long focal length lenses.
For the bayonet S-mount Rangefinder, it was an accessory called Nikon Reflex Housing that had enabled many rangefinder version of the telephoto lenses beyond 135mm to be realized. On the other hand, for the F-Mount reflex Nikon, the Nikon CU1 / AU-1 Focusing Unit which has a design that separates Nikkor long telephoto lenses into two-parts component was another. I supposed basic concept of the later (AU/CU1 Unit) more of less carried over with a trace of the original idea deprived from the rangefinder Nikon RF Reflex Housing. Basically, the restrictive / inaccuracy for focusing in Rangefinder system has long been a technological barrier for development of long telephoto lenses. The Nikon Reflex Housing device was a timely solution which indirectly had expanded capabilities of rangefinder cameras beyond traditional short focal length usage. Although Nikon never had pioneered the idea (Leica did) but they had perfected the concept for own system use. It was considered as an important component for the development of the many long telephoto lenses during the rangefinder photography days for Nikon.

* Ref:- Except for Mr. R. Rotoloni as well as Nikon Japan Nikkor Club Article, who stated it was produced in November, 1953, many other sources which include the Nikon Rangefinder Publication suggested it was produced marketed in 1956. Peter Brackzo Nikon Handbook suggested another, June, 1955. Confusing, but I choose R. Rotoloni / Japan Nikkor Club site as reference date. Nikon Articles says ".. The origin of the lens having specifications of 180 mm f/2.8 goes back to "NIKKOR Auto 180 mm f/2.8" that was released to the press only for the Sapporo Pre-Olympics in 1970 and released to general users in the next year 1971. The focal length of 180 mm further goes back to "NIKKOR-H 18 cm f/2.5" released for Nikon S in 1953 and this lens has a preset stop and was too large and heavy for handheld shooting...". by OHSHITA, Kouichi for Nikkor Club - # Nikon stated date in their official web site. Other sources: Nikon RF illustrated History also suggested 11.1953; but it was mentioned as 06.1955 (Nikon hand book).

Nikon Reflex Housing Model / Type 1 Nikon Reflex Housing for rangefinder camera Model / Type 2
Basically the Reflex Housing was just an accessory designed to fit between the camera and a short mount long focal length lens. Like an extension tube, it adds distance between normal lenses in between. It can be used in conjunction with a Bellow Unit as well as for macrophotography with a Micro-Nikkor. It is equipped with a single mirror within housing, projecting a reverse image for focusing - so it carries a single principle of a reflex camera. The housing was also supplied with a Magnifier Finder for pinpoint focusing. Picture taking is via a double cable release method (one raised the mirror, another trip the shutter release). So far, Nikon had introduced two known models, Model 1/ Model 2 - with the latter has a better lens handling/focusing properties. Besides, it has option for alternate angle finder to choose from (Model 2). Go to | NIKON REFLEX HOUSING SECTION | for further info.

Nikon Bayonet S-mount of the Nikkor rangefinder version  of Nikkor 1:2.5 f=18cm (180mm f/2.5) telephoto lens by Simon Side Lens feature view
The showcased lens here can be considered has a very well kept condition for a 1953 product. The HN-10 lens hood doesn't looks like an original hood for this lens (refer to the Lens hoods section below).

Credit: Image of this Nikkor-H 18cm F/2.5 lens Copyright © 2003. Simon Pulman-Jones® <spulma@> All Rights Reserved. Please respect the visual property of the contributor.

With the exception such as Nikkor 1:1.8 f=3.5cm, Nikkor-N 1:1.1 f=5cm (50mm f/1.1), 8cm lens group (esp. the Nikkor-S 1:1.5 f=8.5cm (85mm f/1.5); the lack of larger aperture lenses in the RF lens group probably had made the Nikkor f=2.5 f=18cm lens stood up among the rangefinder telephoto lens group. But I would regard most of the telephoto RF lenses can easily fit into same category of exotic lenses too. Just imagine the likes of a RF Nikkor 50cm f/5.0 super-telephoto or even the Mirror-Nikkor 100cm f/6.3 - omitting the optical performance, in terms of basic lens spec, don't you think they came close with series of large aperture super-telephoto lenses Nikon offers today ? So, A 180mm focal length with a fast f/2.5 maximum aperture during those days for the rangefinder was just like an equivalent 300mm f/2.8 Nikkor super telephoto magnifies today. The main differences are just the affordability factor which would otherwise restricted them as mass market product. For an example, for most ordinary photographer who may not be a full time professional, the featured Nikkor 180mm f/2.5 here was has a listed price tag of approx. 87,000 yen, excluding Reflex Housing. This was considered as not a cheap lens at all back in 1956. Probably this was one of the reason, there were only 1,200 units of this lens were being produced so far.

Due to its extraordinary light gathering power which has resulted the 18cm Nikkor-H tele lens with quite a sizable dimension. No known chrome version had surfaced so far and thus, we can safely conclude there was only the basic black paint version is available. The lens uses a mix of brass, aluminum alloy in kits basic body construction and was coated in black satin gross finish. This mainly has contributed to its weight factor (it weighs a hefty 1.695kg !). Overall, the lens resembles most of the rigid and rugged physical appearance that found on many of those early lenses. The lens was offered with only a preset diaphragm which stops down to a minimum aperture of f/32 - this is useful to mix the extended depth of field control with the compressed perspective optical nature. When the lens is coupled to a companion reflex housing, I wouldn't suggest the combination is very friendly for handheld shooting. I would think lens handing and shooting convenience using the lens with a Nikon F will make it a easier lens to work with for general photography - even for handheld. It can close focus down to approx. 7ft. and maximum magnification is approx. 3.6X - impressive indeed for such an old design optic which can be good enough for close-focus or frame-filling portraiture and/or other similar usage.

Front view of the lens element of Nikkor-H 1:2.5 f=18cm (180mm f/2.5) Telephoto lens for rangefinder Nikon cameras

Serial number of Nikkor-H 1:2.5 f=18cm (180mm f/2.5)

The two versions:- Earlier ones has the distance scales in feet ONLY but the 2nd version with BOTH scales in feet and Metres (Take note on the serial number of the two displayed models here). This is NOT a big issue, it was just a update but there was nothing involved with optically so, you may just use this as a quick visual guide to differentiate the earlier and later version, that is all.

Side view and comparison on early version RF Nikkor-H 1:2.5 f=18cm (180mm f/2.5) Telephoto lens for rangefinder Nikon cameras Side view and comparison on late version RF Nikkor-H 1:2.5 f=18cm (180mm f/2.5) Telephoto lens for rangefinder Nikon cameras
Credit: All images courtesy of Mr. Kelvin Li from his popular gokelvincameras @ Ebay Store which retails for many hard-to-find Nikon, canon, Contax oldies. Image Copyright © 2008. All rights reserved. Please respect the visual property of the contributing photographer.

Both the exposed front and a slightly recessed rear lens element was quite a large piece of optical glass. Generally it was accepted by most people that the lenses introduced during this era was singularly-coated. Typically, the external reflective lens surface projects a light purple tint/color. In terms of lens handling, the lens has an excellent display of depth of field scales. But as it is a telephoto, these scales are compressed tightly, making visual references quite difficult to refer. The DOF scales provide for f/32, f/16, f/80 and f/2.5 with the last almost not practical as a form of quick visual guide. I would think depth of field preview on the camera section can be more effective as well as faster for such purpose during shooting sequence. All the control rings appear on the lens barrel had been thoughtfully designed in such a way that each has a different grip-pattern to facilitate easy feel during shooting without diverting attention to check the right grip of each function. As mentioned earlier, there were two known variation. Early units only has distance scales printed in Feet only while subsequent model produced have been added / improved with dual-reading scales in feet as well as metric scales. It was also interesting to note the lens actually was provided with a built-in tripod collar. As you may aware the reflex Housing also has one of this place; so, probably Nikon had already anticipated the lens can also be used on the reflex cameras via the N-F introduced later and the on lens built-in collar should comes in handy. I do noticed most of the used units that surface over the years usually show very heavy signs of use. Typically, the coated black paint worn off on the barrel (see an illustrative model above). Well, this may also depends on individual use, the sample that shows at the bottom was probably an early '60 produce was very well maintained.

Unlike the later versions of the 180mm tele-lenses; this rangefinder version does not has a built-in lens hood. It was a metal hood and was supplied as optional accessory.
The correct filter size should be 82mm (P=0.75) which is not easily accessible in the market. You can use either Screw-in type or Series IX front attaching accessories. Generally, other than truly using the lens for the purpose of photography, from another perspective as collectible mechanize optic, usually an enthusiast will seek from the used equipment market for Nikon system accessories to retain original flavor as a oldie collection.

Rotational view - 180mm f/2.5 Nikkor RF lens -1 Rotational view - 180mm f/2.5 Nikkor RF lens -2 Rotational view - 180mm f/2.5 Nikkor RF lens - 3 with tripod collar
Top:- Rotational Views of a typical earlier model, shown unit carries lens S/N 473811 Credit: 3 Images above courtesy of Mr. Simon Pulman-Jones® <>

Lens view and original Nikon lens hood for  RF Nikkor-H 1:2.5 f=18cm (180mm f/2.5) Telephoto lens for rangefinder Nikon cameras
Original metal hood 18cm f/2.5

:- various lens features. This is the original metal lens hood designed for the RF version. The previous shown picture with the Nikon F2 uses a HN-10 lens hood (originally used for
Zoom-Nikkor 85~250mm and/or 200-600mm super zooms (I didn't know it fits).

Credit: All images courtesy of Mr. Kelvin Li from his popular gokelvincameras @ Ebay Store which retails for many hard-to-find Nikon, canon, Contax oldies. Image Copyright © 2008. All rights reserved. Please respect the visual property of the contributing photographer.
Rear exposed lens element for  Nikkor-H 1:2.5 f=18cm (180mm f/2.5) Telephoto lens for rangefinder Nikon cameras Tripod collar base plate for Nikkor 18cm f/2.5

Detailed view on the distance index, scales on RF Nikkor 18cm f/2.5 lens

A dual distance scales version of the Nikon RF Nikkor 180mm f/2.5 telephoto lens

Black painted coated version   Nikon RF Nikkor 180mm f/2.5 telephoto lens

<<< ---This is another version which has dual color scales on metric as well as in feet. Next, even the tripod socket was in black paint coated. Compare this with the earlier model with only the scales printed in feet as well as the different chrome tripod socket base plate above. I would think the dua; scales model should be the late release.

# NOTE:- While I was trying to seek some references, I did observed many online discussions often relate the Nikkor telephoto as a form of "copycat-effort" to the equivalent of the Zeiss 18cm f/2.8 Sonnar telephoto lens. Below, it has taken me a while to gather information from a few sources to present the different formulation used in their respective optical design between the two major brand names. Figures/illustrations (E=Elements used; G=Groups) below should present and/or help to revert wrongful impression all along and hereby recognizing Nikon original effort in enabling this fast speed rangefinder telephoto lens to be possible. In general, the lens uses a rather unusual maximum aperture of f/2.5 and this has a direct influence on the resulting optical design. In many ways, Nikon had their own opinion that correction of residual aberrations this far out from the axis in a long tele-focal length such as this 180mm was still considered as an achievement in optical design back in those days, I agreed.

Optical Design for Nikkor RF 180mm f/2.5 telephoto lens

Optical Design for Carl Zeiss Jena 180mm f/2.8 Olympia Sonnar telephoto lens

Optical Design for Carl Zeiss  180mm f/2.8 Olympia Sonnar telephoto lens

Optical Design for Carl Zeiss  (1978 version) of the 180mm f/2.8 Olympia Sonnar telephoto lens


Nikon Rangefinder S-mount
Nikkor-H 18cm f/2.5 1953 6

Zeiss JENA Olympia Sonnar
1:2.8 f:18cm 1952 5

Carl Zeiss** Olympia Sonnar
Contarex 1966 4

Carl Zeiss (W. Germany) Olympia Sonnar
180mm f/2.8 1978 6

* Ref:- Reconstructed images from info/data acquired from Frank Mechelhoff's GREAT ARTICLES on the Zeiss lenses. **: W. Germany

Lastly, this fast speed Nikkor-H telephoto presents a different kind of attraction to any serious Nikon collectors as it was used to be one of the rare breed of large aperture Nikkor telephoto lens made available for the Nikon rangefinder system. Further, as it has not been produced in large quantity by Nikon during its entire product cycle which indirectly has helped to spike its premium gradually over the years. It looks good and very eye-appealing when mounted on a typical setup in a Nikon S-body with a Reflex Housing attached. Today, even a well "conditioned" lens may easily fetch between USD1,500~1,900 range a unit. This reflects its high in-demanding current state as a worthy collectible.

How this dual platforms Nikkor-H telephoto lens evolved itself after from here:- This short mount Nikkor-H telephoto lens requires a Nikon reflex Housing in order for it to be used on a Rangefinder Nikon for flexible full-range focusing. With the Nikon N-F Tube, it will work on a reflex Nikon body as any normal preset Nikkor lens WITHOUT the need of the reflex housing. It took Nikon quite a while to introduce the reflex version. The first Nikkor 180mm f/2.8 with a non-Ai nor ED glass configuration was introduced quite late in June, 1970 as a Nikkor-P 180mm f/2.8 AUTO lens. The last of the Nikkor-P.C version was believed to have been updated as an Ai-Nikkor in 1977/78 too along with, subsequently Nikon had dropped the old ways of marked lens data at the front with a more uniform data printed. The lens did went through a round of face-lift during this general lens updating program to all Ai-period. In 1980, this popular Nikkor tele-lens again had gone through a major / radical update as Nikkor 180mm f/2.8ED was official introduced. It was the first Nikon medium telephoto lens that uses an ED glass in its optical design. The same lens was probably updated with Ai-S spec after some of the manual focus Nikon SLR were beginning to offer Multi-programmed/Shutter Priority AE shooting modes, this could have happened between 1982/84. The early AUTOFOCUS (AF Nikkor 180mm f/2.8S ED-IF) version of this highly affordable ED-glass powered Nikkor classic telephoto lens was launched in 1986 as an original first series of AF Nikkor lens package for the mid price Nikon F501. It was not actually a very popular model due to some weak designs on its exterior but for the first time, Nikon had included internal focusing to this new autofocus telephoto lens version. It next update, probably occurred between 1988/9 was updated as a MK II version. Nikon has took the opportunity to gave the lens an all new appearance as well as improved its lens handling property. It had also patched many of the weaknesses that found on the predecessor where quite quickly, their effort had restored confidence of users again. The last series (current as at 2008) of this evergreen Nikkor telephoto was released in 1994 as a native AF-D Nikkor lens. The AF Nikkor 180mm f/2.8D IF-ED enables 3D Matrix Metering with any capable Nikon SLRs for almost foolproof ambient/flash exposure measurement. As at 04.2008, Nikon has not announced any update such as G-Spec nor IS version.

Superimposed   illustration of the Optical lens elements / construction for Nikkor-H 18cm f/2.5 telephoto lens
Basic Technical Specification for Nikkor-H(C) 1:2.5 f=18cm telephoto lens:-

Lens Mount
: Nikon Bayonet S-mount for RF models (Short Mount)
Compatible Models: Nikon S-Series rangefinder models via
Nikon Reflex Housing; Nikon F/Nikkormat via N-F Tube
Focal Length: 180mm (18cm)
Angle of View: 13
° 30' (Diagonal; 11° 30' (Horizontal); 7° 30' (Vertical)
Maximum / Minimum Aperture: f/2.5 / f/32
Optical Construction: 6 elements in 4 groups
Minimum Focusing Distance: 2.1m (approx. 7 ft) ~
(Marked values: Feet only for early model:- OO 900, 300, 200, 100, 70, 50, 40, 35, 25, 21, 18, 15 ... ); Model 2: Feet: starts from 300,... Metres: 100, 50 ...
A setup of Nikon Reflex Housing with Nikon SP mounted with a Nikon RF Nikkor-H 18cm f/2.5 (180mm f/2.5) telephoto lens / lens hood
Depth of Filed table for Nikkor-H 180mm f/2.5 rangefinder version   <<<--- Depth of Field Scales Tables for Nikon RF Nikkor 18cm f/2.5 256k Jpeg file)
Link - scales. dimension / measurement for RF Nikkor-H 18cm f/2.5   <<<-- Dimension/ scales 16k Gif File

Depth of Filed Scales: f/32, f/16, f/8.0, f/2.5.
Infra Index: Provided
Magnification ratio: 3.6X; Filter Attachment Size
**: 82mm (P=0.75) Screw-in type / Series IX
Dimension: no info / Weight (body only): 1,695g (approx. 60oz); Leica Screw mount version (SM): approx. 59.8oz

Standard Accessories: Requires Nikon Reflex Housing; Front/Rear lens cap, Lens hood (HN-10) as standard accessories. Optional: Optical filters etc. N-F tube/adapters for Nikon SLR cameras

Other Information
: Focusing recommendation for Nikon F (via N/F Tube): A, B, E, F, J, G2, G3, H2 & H3 (C, D, G4 may be possible); ** Slip-on outer diameter: 85mm; M39 Screw Mount version was also available for Leica, Canon etc. via their respective version of Reflex Housing. Serial Numbering References:- Early versions starts from 373500 ~ 373877. Followed up model could had been started from 473500~474176. Total Number: approx. 1,200 units. Ref: Mr. Robert Rotoloni, author of An Illustrated History of Nikon Rangefinder Cameras.

W-Nikkor-O 1:4 f=2.1cm | W-Nikkor.C 1:4 f=2.5cm | W-Nikkor.C 1:3.5 f= 2.8cm | W-Nikkor.C 3.5cm lens Group (3.5/2.5/1.8) | Stereo-Nikkor 1:3.5 f=3.5cm | 5cm (50mm) lens group | RF Micro-Nikkor 1:3.5 f=5cm | Nikkor-P.C 1:2 f=8.5cm lens group / Nikkor-S.C 1:1.5 f=8.5cm lens group | Nikkor-P.C 1:2.5 f=10.5cm lens group / Nikkor-T 1:4 f=10.5cm | Nikkor-Q.C 13.5cm lens group: 135/4, 135/3.5 Early / Last Version, 135/4 Bellow lens | Nikkor-H 1:2.5 f=18cm | Nikkor-Q 1:4 f=25cm | Nikkor-T 1:4.5 f=35cm | Nikkor-T.C 1:5 f=50cm | Reflex-Nikkor 100cm f/6.3

System Accessories for Nikon Rangefinder cameras
Optical Finders (4 parts):-
Fixed Focal length Finders (index page): 2.1cm, 2.5cm, 2.8cm, 3.5cm, 35cm Stereo, 5cm, 8.5cm, 10.5cm, 13.5cm | Variframe / Varifocal / Sport-frames | Nikon Reflex Housing

Nikon S36/S72/S250 Motor Drives / S36 Manual | light meters | Nikon RF Flash/Speedlights | Close-up photography / Repro Copy Outfit / Nikon Bellow Focusing Device (in progress) | Cases/Compartments | Lens & body caps, Lens Hoods/shades, Original Price Lists | packaging/boxes

Instruction Manuals

Related info:- Main index page for Leica/Leitz | Contax/Carl Zeiss | Seiki Kogaku (Canon)

Recommended External Web Resources:- A Gorgeous View of the RF Nikkor 18cm f/2.5 mounted on a Nikon SP at SP5-World, Japan; Discussion of RF Nikkor 18cm at; RF Nikkor extracted from Nikon Historical Society Journal; Discussion Forum at 1) Nikon Historical Society (NHS) Discussion Forum; 2); Nikon Japan History of lenses; Nikon Society (Kenkyukai), Tokyo, Japan; extracted link RF articles by Stephen Gandy / Cameraquest; Excellent article of Nikon S3 by Mr. Bjørn Rørslett-NN/Nærfoto with a shot using the 21mm f/4.0; SP5-World, Japan - excellent source on many RF Nikon/Nikkor (Japanese/English); Another lovely site with many info on RF Nikon (in Japanese); LASTLY before you click off, have you ever heard or Seen of a (induarial) Nikkor 180mm f/1.5 (1942) before ?

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