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Luiz Paracampo
Luiz Paracampo

Brazil
1809 Posts
My Collection

Posted - Jan 05 2015 :  3:54:09 PM  Show Profile  Visit Luiz Paracampo's Homepage  Reply with Quote


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


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

Alexander K.
AlexanderK
Germany
536 Posts
Posted - Jan 05 2015 :  5:46:26 PM  Show Profile  Reply with Quote
Very interesting, Luiz.
The camera seems to be based on F-21, but the CZJ-lens is really a masterpiece.
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Jacques M.
France
2209 Posts
Posted - Jan 06 2015 :  03:10:45 AM  Show Profile  Reply with Quote

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

Jacques.
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Detlev Vreisleben
Detlev
Germany
54 Posts
Posted - Jul 30 2018 :  3:20:52 PM  Show Profile  Reply with Quote
The camera is a design of the OTS (Operativ technischer Sektor) of Stasi
and not a F21 clone
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Detlev Vreisleben
Detlev
Germany
54 Posts
Posted - Jul 30 2018 :  3:50:14 PM  Show Profile  Reply with Quote
The lens is a pinhole lens JO-1
http://www.ussrphoto.com/UserContent/3072018_JO-1SGk.jpg

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Luiz Paracampo
Luiz Paracampo
Brazil
1809 Posts
My Collection

Posted - Aug 02 2018 :  7:37:17 PM  Show Profile  Visit Luiz Paracampo's Homepage  Reply with Quote
I believe to be a telecentric relay formula once pinhole has no lens at all

Regards
LP
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Luiz Paracampo
Luiz Paracampo
Brazil
1809 Posts
My Collection

Posted - Aug 02 2018 :  7:48:31 PM  Show Profile  Visit Luiz Paracampo's Homepage  Reply with Quote
see complete optical details at
http://www.marcocavina.com/articoli_fotografici/zeiss_cute_dfr_ddr_lenses/00_pag_english.htm
LP
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Detlev Vreisleben
Detlev
Germany
54 Posts
Posted - Aug 03 2018 :  10:13:28 AM  Show Profile  Reply with Quote
Last try
http://www.ussrphoto.com/UserContent/382018_Prosp_a.jpg

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Luiz Paracampo
Luiz Paracampo
Brazil
1809 Posts
My Collection

Posted - Aug 03 2018 :  10:49:49 AM  Show Profile  Visit Luiz Paracampo's Homepage  Reply with Quote
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
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Luiz Paracampo
Luiz Paracampo
Brazil
1809 Posts
My Collection

Posted - Aug 03 2018 :  10:51:57 AM  Show Profile  Visit Luiz Paracampo's Homepage  Reply with Quote
according to your robot pictures included it is a relay (telecentric) lens.
Pierre Touzelet will have the final word.
Regards
LP
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Detlev Vreisleben
Detlev
Germany
54 Posts
Posted - Aug 03 2018 :  11:05:10 AM  Show Profile  Reply with Quote
Here you can see the pinhole of the JO-1.
Regards,
Detlev
, diameter 1 mm
http://www.ussrphoto.com/UserContent/382018_EintrittspupillePfeil.jpg

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Detlev Vreisleben
Detlev
Germany
54 Posts
Posted - Aug 04 2018 :  09:52:42 AM  Show Profile  Reply with Quote
The pinhole lens JO-1 consists of a wide angle front-stop lens and an image side telecentric lens

Detlev
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Luiz Paracampo
Luiz Paracampo
Brazil
1809 Posts
My Collection

Posted - Aug 04 2018 :  11:20:47 AM  Show Profile  Visit Luiz Paracampo's Homepage  Reply with Quote
Now it is clear!
For optical working the front stop is unesseary it is used only for desguising purpose!

Regards
LP
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Detlev Vreisleben
Detlev
Germany
54 Posts
Posted - Aug 04 2018 :  12:31:35 PM  Show Profile  Reply with Quote
The lens was used by the Stasi to take compromising photos in hotels. Therefore it was necessary to disguise the lens opening.
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Guido Studer
Guido
Switzerland
326 Posts
My Collection

Posted - Aug 05 2018 :  08:30:04 AM  Show Profile  Visit Guido's Homepage  Reply with Quote

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
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Pierre Tizien
Moxies
France
179 Posts
My Collection

Posted - Aug 21 2018 :  4:56:22 PM  Show Profile  Visit Moxies's Homepage  Reply with Quote
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

Edited by - Moxies on Aug 21 2018 4:57:11 PM
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