Additional Information on Medical-Nikkor 200mm f/5.6 Auto lense

 

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Original 200mm f/5.6 Medical-Nikkor Auto lense

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Download a PDF file (187k) for a few relevant reference charts for reproduction ratios and close-ups, including all the info appeared in this page)

Credit: Image of this Medical-Nikkor 200mm f/5.6 lense courtesy of "ALY-SON BECKER" <eflorea2@mchsi.com> Image Copyright © 2003. All rights reserved. Image has been scaled and retouched from the originals for broadcasting in this website.

This original version of the Medical Nikkor 200mm f/5.6 auto lense was debuted back in November, 1962. This specialized Nikkor lens has a 4 elements in 4 group optical design. Incorporating a ringlight unit around its front element, the Medical-Nikkor was an ideal solution for medical professionals to handle close-up work in the field of medicine, and has numerous other applications in science and industries.

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The basic setup consists of a prime lens, a set of six auxiliary lenses and an AC or a battery power source for operating the lighting units. The lens offers a choice of eleven different magnification ratios in combination with the six auxiliary lenses. (The prime lens alone gives the reproduction ratio of 1/15X and the auxiliary lenses, attached singularly or in varied combinations, provide a range of magnification ratios from 1/8X to an amazing 3X reproduction i.e. 1/8X, 1/6X, 1/2X, 1X, 1/8X and 2X).

This old Medical-Nikkor has a self-compensating design, eliminating all bothersome calculations for setting the diaphragm in relation to film speed and reproduction ratio. All that is required of the photographer is to set the lens for the ASA speed of the film used, attach the auxiliary lens or lenses in accordance with the desired magnification ratio, focus by moving the camera toward or away from the subject and release the shutter. It was also one of the first batch of Nikon auto thyristors that provide automatic flash exposure. Its primary objective was to facilitate convenience in lens handling, permitting deliveries of high quality images of optimum exposure even if it was handled by someone that has little photographic knowledge. The was made possible with the incorporation of an automatic lens diaphragm stops down to correct aperture at the moment of exposure.

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The ringlight surrounds the front element of the lens has a typical old reflective flash surface which aims to produce even and shadowless illumination. It may be removed from the lens for servicing and for providing special lighting angles. The color temperature of 6000° K permits the use of daylight color film. The flash duration is 1/500 second. The Medical-Nikkor ringlight synchronizes with the prevailing Nikon F2 series models at the shutter speed of 1/60 second; however, when used it with any of the Nikon F Series Models it operates at 1/30 second, while the Nikkormat series will synchronize at 1/60 second. Actually, there are also two illumination units are built into the lens: an electronic ringlight and pilot lamps.

Credit
: Image of this Medical-Nikkor 200mm f/5.6 lense courtesy of "ALY-SON BECKER" <eflorea2@mchsi.com> Image Copyright © 2003. All rights reserved. Image has been scaled and retouched from an original by Mary. Aly-Son Becker..

Positioned behind the ringlight are four incandescent bulbs that comprise the pilot lamps. These facilitate precise focusing in the dark. The lens also incorporates a device for printing an identification number (1 to 39) or magnification ratio (1/15X to 3X) in the lower right-hand corner of each frame by making use of a small fraction of the ringlight output or "leak" flash.

These figures serve as references, key numbers or as a guide to "right-side-up" projection. The intensity of the "leak" flash can be adjusted in three steps as indicated by "A,', "B" and "G" on the Identification Number / Reproduction Ratio Adjuster. When an unnumbered negative is required, the imprinting device can be blocked off by setting the adjuster to "D". An ASA film speed settings is provided at the rear end of the lens for use with adjustment of flash in accordance to film speed of the film in used. On the other hand, the lens can actually stopped down to a very small aperture at f/45 for maximum control of depth of field since most often, this lens is used for extreme close-up flash photography. The metered Photomic Series finders in the Nikon F2 and Nikon F function solely as a viewfinder when used with the Medical Nikkor. The self-compensating feature of the lens diaphragm eliminates the need for exposure metering. Lastly, this lens can also be used with AC power where an AC power unit is sold separately as optional accessory.
Note: Serial number for the earliest version may bear serial number that began from 104011.

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Specification:

Focal length
: 200mm
Maximum aperture: 1:5.6
Lens construction: 4 elements in 4 groups
Picture angle: 12°20'
Aperture scale: f/5.6 - f/45
Aperture diaphragm: Fully automatic
Attachment size: 38mm (P=0.75)
Dimensions: 80mm dia.x 176mm length (3 5/32 in x 6-15/16 in.)
Weight: 670g (23.60z)
Accessories: 38mm screw-in front cap, rear captype F, safety camera shoe cover, 6 auxiliary lenses: 1 /8X, 1/6X, 1/4X, 1/2X, 1X, 2X, AC power unit, DC power unit, synch cord, 1.5m power source cord, 1.6m power source cord, leather compartment case, 2.5V light bulb.

Credit: Image of this Medical-Nikkor 200mm f/5.6 lense courtesy of "ALY-SON BECKER" <eflorea2@mchsi.com> Image Copyright © 2003. All rights reserved. Image has been retouched slightly.

Below are some useful reference charts and tables in relation to its functions and features:
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Optical Construction of 4 elements in 4 groups used in this Medical Nikkor 250mm f/5.6 Auto
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| Next Version | of the Medical-Nikkor lense debuted during early 1970 involved with some facelift and improved its visual identifications and lens handling. 1/2

Versions: | Medical-Nikkor 120mm f/4.0 IF | Medical Nikkor 200mm f/5.6 | Relative: MF Micro-Nikkor lenses @ 105mm, 200mm and other Nikkor prime telephoto lenses at 200mm

| Back | Medical-Nikkor120mm f/4.0 IF | Back | to Index Page of Special Applications Nikkor lenses

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Recommended links to understand more technical details related to the Nikkor F-mount and production Serial Number:
http://rick_oleson.tripod.com/index-153.html by: my friend, Rick Oleson
http://www.zi.ku.dk/personal/lhhansen/photo/fmount.htm by: Hansen, Lars Holst
http://www.mir.com.my/rb/photography/hardwares/nikonfmount/lens2.htm
http://www.photosynthesis.co.nz/nikon/serialno.html

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Credit: MCLau®, who has helped to rewrite some of the content appeared this site. Chuck Hester® who has been helping me all along with the development of all these Nikon websites; Lars Holst Hansen, 'Hawkeye' who shares the same passion I have; Ms Rissa, Sales manager from Nikon Corporation Malaysia for granting permission to use some of the official content; Ted Wengelaar, Holland who has helped to provide many useful input relating to older Nikkor lenses; Some of the references on production serial numbers used in this site were extracted from Roland Vink's website; Hiura Shinsaku from Nikomat Club Japan. Lastly, to all the good people who has contributed their own expeience, resources or kind enough granted permission to use their images of their respective optic in this site. It is also a site to remember a long lost friend on the Net. Note:certain content and images appeared in this site were either scanned from official marketing leaflets & brochures published by Nikon and/or contribution from surfers who claimed originality of their work for educational purposes. The creator of the site will not be responsible for may discrepancies arise from such dispute except rectifying them after verification. "Nikon", "Nikkormat", "Nippon Kokagu KK" & "Nikkor" are registered tradename of Nikon Corporation Inc., Japan. Site made with an Apple IMac.