KGB fish eye by Zeiss

http://www.ussrphoto.com/UserContent/512015_kgb zeiss.png


at
http://www.marcocavina.com/articoli_fotografici/Zeiss_cute_DFR_DDR_lenses/00_pag.htm

Very interesting, Luiz.
The camera seems to be based on F-21, but the CZJ-lens is really a masterpiece.

And thanks for the site I did not know. What a mine of information about rare Zeiss lenses...

Jacques.

The camera is a design of the OTS (Operativ technischer Sektor) of Stasi
and not a F21 clone

The lens is a pinhole lens JO-1
http://www.ussrphoto.com/UserContent/3072018_JO-1SGk.jpg

I believe to be a telecentric relay formula once pinhole has no lens at all

Regards
LP

see complete optical details at
http://www.marcocavina.com/articoli_fotografici/zeiss_cute_dfr_ddr_lenses/00_pag_english.htm
LP

Last try
http://www.ussrphoto.com/UserContent/382018_Prosp_a.jpg

all thet is true but the real pinhole, can't be seen at the diagram.
so far extraordinary low apertures cant aid instant fotos. if any movement the photo will be blurred or simply unregistered what is not wanted and really useless by any spionage dept.
Regards
LP

according to your robot pictures included it is a relay (telecentric) lens.
Pierre Touzelet will have the final word.
Regards
LP

Here you can see the pinhole of the JO-1.
Regards,
Detlev
, diameter 1 mm
http://www.ussrphoto.com/UserContent/382018_EintrittspupillePfeil.jpg

The pinhole lens JO-1 consists of a wide angle front-stop lens and an image side telecentric lens

Detlev

Now it is clear!
For optical working the front stop is unesseary it is used only for desguising purpose!

Regards
LP

The lens was used by the Stasi to take compromising photos in hotels. Therefore it was necessary to disguise the lens opening.

Hi all

By the way there is a 24mm Macro lens on Kickstarter now with an opticaly very similar construction like the Zeiss JO-1:

https://www.kickstarter.com/projects/laowa/revolutionize-macro-videography-laowa-24mm-f-14-pr?ref=epdhdr


http://www.ussrphoto.com/UserContent/582018_8b57eb50abc7d59e6292c472fc45a307.jpg

Best wishes - Guido

quote:

---

Originally posted by Jacques M.


And thanks for the site I did not know. What a mine of information about rare Zeiss lenses...

Jacques.

---

He also has some very interesting pages about rare soviets. Since he's friend of Dr. Mladek, he has access to rare birds.

Take a look on this page http://www.marcocavina.com/articoli_tecnici_fotografici.htm and look for the word "sovietici" (Ctrl+F), you will find some interesting articles