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 Jupiter 9 - Zeiss 2/8,5cm
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Jacques M.
France
2214 Posts
Posted - Jun 26 2018 :  08:27:37 AM  Show Profile  Reply with Quote

A photo made with my Jup 9 (in fact, a relabelled Zeiss) not far from home. Really, a great lens.


http://www.ussrphoto.com/UserContent/2662018_DSC00428.JPG



Jacques M.
France
2214 Posts
Posted - Jun 26 2018 :  08:37:43 AM  Show Profile  Reply with Quote
Another one.


http://www.ussrphoto.com/UserContent/2662018_DSC00432.JPG

Difficult to use this lens on a Fed, unhappily. A well known problem... These ones were made on A7.

Amitiés. Jacques.


Edited by - Jacques M. on Jun 26 2018 08:49:59 AM
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Jean-Pierre
D-KLIK
France
22 Posts
Posted - Jul 05 2018 :  05:36:29 AM  Show Profile  Reply with Quote
Bonjour Jacques,
For my education, what is the "well-known problem" on the Fed ?
Rgds
Jean-Pierre
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Jacques M.
France
2214 Posts
Posted - Jul 06 2018 :  10:24:17 AM  Show Profile  Reply with Quote
Hello Jean-Pierre!

A complete explanation is beyond my possibilities. As for my English...

In fact, there are several problems. All are due to the fact that Sonnars were originally made for Contax lenses, not Leica type ones.
For example, Leica rangefinders are calibrated for 51,6mm of focal length; Contax ones for 52,4mm. Brian Sweeney proposes a method to correct that:
http://ussrphoto.com/Wiki/default.asp?WikiCatID=50&ParentID=49&ContentID=1570&Item=Jupiter%2D3+Clean%2C+Lube%2C+Adjust

About prewar Feds, it's more troublesome, as bodies and lenses were appaired one by one: they did not have the Leica specifications. So, if I want to mount a Sonnar on a Fed S, first I must control the register (28,8mm) and correct it if necessary.

All these questions are even more evident with a Sonnar 2/8,5cm. With a 2/5cm, you can use the diaphragm to be "within". With a 2/8,5cm, it's more difficult with the reduced depth of field. If you add that the origin of the Sonnars we have now is very difficult to trace...

The result: some lenses are completely unusable without adjustment. And you are very lucky if you find a 2/8,5cm Sonnar which covers correctly the whole distance range. Mine (a 1951 Jup 9) is perfect at 1,15m, but gets infinity only from f4/5,6...

If you want more, please phone!

Amitiés. Jacques.

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