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10-09-2013, 09:12 PM   #1
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Nikon for Pentax 6X7?

Nikon Nikkor Q 4 25 cm Pentax 6x7 Bajonett | eBay

Is that a real lens or something someone cobbled together for macro work?

10-09-2013, 09:49 PM   #2
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Google is our friend.

The lens at the auction closely resembles a reflex-adapted (sort of like a Visoflex) 250mm lens developed in the mid-1950s for the Nikon S-series rangefinder camera.

Nikon's RF Nikkor (Rangefinder bayonet S-mount) 1:4 f=25cm (250mm f/4.0) Telephoto lens- index Page

(Nippon Kogaku K.K./ Nikon RF Nikkor-Q 1:4.0 f=25cm MK II (250mm f/4.0) telephoto lens
for Nikon Bayonet S-Mount Rangefinder cameras...about 1/2 way down the page.)

The mount (if truly Pentax 6x7), was undoubtedly cobbled on and the registration distance may well be correct. The main question I would have is whether the coverage circle of the lens is adequate for the much larger 6x7 negative.


Steve

Last edited by stevebrot; 10-09-2013 at 09:54 PM.
10-09-2013, 09:49 PM   #3
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Looks like a "Frankenlens" to me!

Phil.
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