Jupiter 12 to Contax iia compatibility

[DLox]

Can anyone tell me will the Jupiter 12 ( f/2.8, 35mm. ) will engage with a Contax iia?

 

[Retro-Grouch]

Yuri at fedka.com says that this lens is a copy of the pre-war Biogon, designed to mount on pre-war Contax copies such as the Kiev, and therefore won't mount on post-war Contax cameras such as the IIa. A pity, since it's a great lens.

 

[DLox]

Thank you Retro-Grouch. I was afraid of that, as you pity, great lens.
DLox.

 

[DC1030]

There is a post-war Biogon made by Zeiss Oberkochem, 2.8/35, which fits to the Contax IIa...

 

[Retro-Grouch]

The post-war Biogon will work, but a quick glance at auction site prices shows them running between $500 and $800. Gulp!

 

[dexdog]

Unfortunately, not many good and inexpensive options for 35mm focal length for Contax IIa and IIIa cameras. The pre-war CZJ f3.5 Orthometar and post-war East German CZJ f2.8 Biometar will fit, but are kinda rare and expensive, as is the post-war f3.5 Planar. The S-mount Nikons of f1.8, f 2.5 and f 3.5 and are great lenses and work well on Contax IIa and IIIa, but are expensive, too. The CV lenses are good too, but not cheap either. I think that Tanak or Komura made 3.5 cm lenses for Contax/Nikon mount, but I have never used one.

 

[davidswiss]

I've already asked this and the following are the suggestions I was given:
Carl Zeiss Biogon 35mm f2.8 (post war)
Carl Zeiss Planar 35mm f3.5
Voigtlander S-C Skopar 35mm f2.5
Also Nikkor S mount lenses
W-Nikkor 35mm f1.8
W-Nikkor 35mm f2.5
W-Nikkor 35mm f3.5

Good luck.

 

[Sonnar Brian]

I've adjusted Nikkor S-Mount wide-angle lenses for the Contax- typically the shim need to be reduced slightly for optimal focus. Most likely will not notice when stopped down. The F2.5 lens- used wide-open made a difference.

 

[dexdog]

good point, Brian.

 

[farlymac]

Less expensive option is to get a well serviced Kiev to use it on.


PF

 

[DLox]

Thank you, gentlemen, for your advice and knowledge. I did find a Biogon F1:2.8 but the listing included 'Sold out'.
I will continue to use your suggestions in my quest.
D. Lox

 

[Shafovaloff1]

I have a 35mm Zeiss Biometar in parts...waiting to clean some fungus from behind the front lens....not as easy as I thought. But the Jupiter 12 on the Contax I or II is super!

 

[Shafovaloff1]

I am comparing the CZJ Biometar 35 f2.8 to the Jupiter 12 using a Contax I(e) at the moment. It may be possible to post the resulting pictures on this site.

 

[David Murphy]

The Nikon RF wides will work fine, some of the slower ones can be had for less than $300 - not cheap, but darn good lenses and cheaper than Contax. The Zeiss post-war Planar is usually a little cheaper than the post-war Biogon, although not so common - they do come up for sale regularly on eBay. The CV 35/2.8 in Nikon RF mount is fairly reasonably priced for what it is.

 

[flavio81]

My Contax IIa was modified so the Jupiter-12 fits.

It's simple: whoever did the modification, drilled the inside chamber (drilled part of the pieces that cover out the shutter curtain) so the rear element of the Jupiter-12 can enter inside.

Thus i can use the J-12, and I do have one attached to it right now.

 

[etarbar]

My Contax IIa was modified so the Jupiter-12 fits.

It's simple: whoever did the modification, drilled the inside chamber (drilled part of the pieces that cover out the shutter curtain) so the rear element of the Jupiter-12 can enter inside.

Thus i can use the J-12, and I do have one attached to it right now.

Hello. Would you please show us your mod? Upper and lower part of the cover should be grinded off, am I correct? Thank you very much for your kind reply.