is this prototype stereo lens ?

[syun]

hello , im syun !

first topic this forum , and im sorry im not good at english


i have some weird nikon ( maybe ? ) stereo lens

lens body looks like GN nikkor lens , but not engrave name

serial is 144301


and also i have nikkor 50mm f/1.2  250004

maybe this lens is first ai-s 50mm 1.2 ?

 

[Jack Dahlgren]

That stereo lens is nice. Though these days it is easier to just join a couple of digital cameras together at the baseplate and use an electronic trigger.

[Hugh_3170]

Leitz made a 3.3cm, f/3.5 stereo lens called a STEMAR for their screw thread and M series bayonet mount film cameras.   

Search for STEMAR on Ebay and you will often see them being offerred for sale at HUGE prices.   

[Akira]

Hi, syun, welcome to NG!

The lens you have should be this one (Stereo-Nikkor 3.5cm/f3.5).  The depicted complete set was offered in a second-hand camera show held in Ginza:

https://dc.watch.impress.co.jp/img/dcw/docs/744/353/html/025.jpg.html

[Roland Vink]

That one was for rangefinder cameras, the one Syun has is for F mount. I vaguely remember seeing another like it before, it was based on the 45/2.8 GN lens.

[Snoogly]

I spent a few hours researching this, and could come up with no conclusion than it’s the 3.5, but ....

Either way, if it’s real, it’s worth close to a million yen, methinks.

[MEPER]

What about the blue rear-cap?
Has that been seen before?

[Hugh_3170]

A million yen is not inconsistent with some of the prices being demanded for the Leitz STEMAR, especially for complete kits.

I spent a few hours researching this, and could come up with no conclusion than it’s the 3.5, but ....

Either way, if it’s real, it’s worth close to a million yen, methinks.

[Erik Lund]

Very special stereo lens! The resemblance with the. GN Nikkor is obvious;)


The 50 mm 1.2 AIs is according to Roland page the first in the 2500xx range
http://www.photosynthesis.co.nz/nikon/serialno.html#50fast
Your lens has the engraving on the focus ring like it should so not an AI lens.
Congratulations! Two very special lenses

[Fons Baerken]

Oktober 2017 here i met someone who was carrying stereophotocameras



 

[syun]

 thank you so much a lot of reply


 i took a picture with this lens .

 nikon d7500 , lens distance 0.7m and f8

 image quality is not so good . . 

[ColinM]

 i took a picture with this lens .

Depending how comfy you are doing cross-eyes, it's at least generated a tangible 3D image

[Jack Dahlgren]

 thank you so much a lot of reply


 i took a picture with this lens .

 nikon d7500 , lens distance 0.7m and f8

 image quality is not so good . . 

It looks as if the prisms/mirrors are slightly out of alignment. Try it at some other distances as well.

[Roland Vink]

What about the blue rear-cap?
Has that been seen before?

I've seen that on other prototype lenses.

[MILLIREHM]

A very special lens. Of course it made me think of the 35 mmm f/3,5 Stereo lens for the Nikon S cameras. So we have an F-mount prototype. I wonder which focal lenght it is (35,45?) there is no visible indication