NikonGear'23

Gear Talk => Lens Talk => Topic started by: syun on January 22, 2021, 15:27:07

Title: is this prototype stereo lens ?
Post by: syun on January 22, 2021, 15:27:07

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 ?

 

Title: Re: is this prototype stereo lens ?
Post by: Jack Dahlgren on January 22, 2021, 19:49:22

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.

Title: Re: is this prototype stereo lens ?
Post by: Hugh_3170 on January 22, 2021, 22:32:11

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

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

Title: Re: is this prototype stereo lens ?
Post by: Akira on January 23, 2021, 00:36:19

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

Title: Re: is this prototype stereo lens ?
Post by: Roland Vink on January 23, 2021, 01:47:21

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.

Title: Re: is this prototype stereo lens ?
Post by: Snoogly on January 23, 2021, 10:30:57

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.

Title: Re: is this prototype stereo lens ?
Post by: MEPER on January 23, 2021, 10:40:42

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

Title: Re: is this prototype stereo lens ?
Post by: Hugh_3170 on January 23, 2021, 10:47:38

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

Quote from: Snoogly on January 23, 2021, 10:30:57

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.

Title: Re: is this prototype stereo lens ?
Post by: Erik Lund on January 23, 2021, 13:32:45

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 (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

Title: Re: is this prototype stereo lens ?
Post by: Fons Baerken on January 23, 2021, 14:51:08

Oktober 2017 here i met someone who was carrying stereophotocameras

(https://live.staticflickr.com/4490/37257108910_8784b8067e_o.jpg)

 :)

Title: Re: is this prototype stereo lens ?
Post by: syun on January 23, 2021, 15:53:07

 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 . .  :-\

Title: Re: is this prototype stereo lens ?
Post by: ColinM on January 23, 2021, 16:31:33

Quote from: syun on January 23, 2021, 15:53:07

 i took a picture with this lens .

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

Title: Re: is this prototype stereo lens ?
Post by: Jack Dahlgren on January 23, 2021, 17:17:18

Quote from: syun on January 23, 2021, 15:53:07

 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.

Title: Re: is this prototype stereo lens ?
Post by: Roland Vink on January 23, 2021, 19:01:47

Quote from: MEPER on January 23, 2021, 10:40:42

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

I've seen that on other prototype lenses.

Title: Re: is this prototype stereo lens ?
Post by: MILLIREHM on January 23, 2021, 23:21:37

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