Canon LTM I bought a Canon 7

Canon M39 M39 screw mount bodies/lenses
Cerium oxide takes a long time to etch glass so you shouldn't worry. Polish the glass evenly, rotating the element as you work the abrasive around in an oval with a cotton swab or microfiber cloth.
Phil Forrest
 
I was reading this thread, but the Jupiter 12 has no problems on the A7 due to the depth of the rear? Are there any serials that can go?
thanks
 
There are several versions of the Jupiter-12 in Thread Mount, some have metal guards over the rear group. I am able to use my 1952 J-12 (that has stamped serial numbers showing it is a Zeiss Biogon from 1943) with my Leica M8 and Leica M9, but not with my Canon 7 or Canon P. The Canon 7 and Canon P have light baffles, the large rear element with the metal collar hits into them.

This lens required changing the Shim for proper focus, it was way off. That probably explained the perfect glass and $55 price. Now- it is a fine performer.
 
paperino said:
I was reading this thread, but the jupiter 12 has no problems on the A7 due to the depth of the rear? Are there any serials that can go?
thanks.
Click to expand...

The J12 should fit fine on your A7. Clearance is sufficient and the A7 sensor is large enough so the surround is out of the way.

Even if it physically fits, your performance is likely to be disappointing — [most*] sensor arrays are not built for an exit pupil so close to the array. Light rays coming out of the close rear element will hit the corners of the sensor at such an oblique angle that they aren’t received well. The J12 is better suited to film use for this reason. (Sensor arrays have ‘depth’; film emulsion is a much shallower receptor and can ‘see’ oblique light.)

[*] see reply regarding microlens arrays on Leica M8, M9 etc..
 
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The Jupiter-12 does well on the M9, and M Monochrom. Also the M8. These cameras have thin filter stacks and use offset microlens arrays. They do well with the J-12 with it's rear element close to the sensor.

J12_Close by fiftyonepointsix, on Flickr

J12_Distance by fiftyonepointsix, on Flickr

This lens required the shim to be changed for the Leica to attain best focus. This one is from 1952.

This lens hits the light baffles of my Canon 7 and Canon P.
 
The Canon 7 is a largish RF compared to it predecessors. The Canon 50/1.4 would balance very well on that camera. But I’d also strongly recommend looking for a Canon 50/1.5, the sonnar design lens from the early 1950s. It’s a terrific optic, giving that classic sonnar look wide open, and quite excellent for landscape or street photography stopped down.

bobkonos by bingley0522, on Flickr

Scooters, Alfas, and antipasti by bingley0522, on Flickr


Air conditioning and conversation by bingley0522, on Flickr

Paysage breton by bingley0522, on Flickr
 
I just got a J-12, perfect on my Canon 7. I read that a lens hood is recommended, which type you suggest, as too wide can interfere with the viewfinder.

Tks
 
I dunno. The front element is so small and the whole lens is actually a natural hood. And it seems impossible to change the aperture with a hood mounted onto the J12.
 
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