I'm not sure, but i think the new Voigtlander (Cosina) screwmount-to M adaptor may do the job, otherwise you're obliged to search for a "vintage" Leitz one.
The problem is, do you really think you will get an acceptable image quality with such a lens? Don't get me wrong, I'm Russian myself and i know we may have done some pretty pieces of glass, in ex&le an Apo-Tele-Zenitar 135. But... Even in my worst nightmare i would not mount this sh..t on my Leica M!
> The problem is, do you really think you will get an acceptable image > quality with such a lens? Don't get me wrong, I'm Russian myself and i > know we may have done some pretty pieces of glass, in ex&le an > Apo-Tele-Zenitar 135. But... Even in my worst nightmare i would not > mount this sh..t on my Leica M!
I think the joy of photography resides in a big percentage on experimenting and playing. I own a Jupiter-8 50mm f/2 (a copy of the Zeiss Sonnar 50mm f/2) and I must tell it produces very very good results. Of course it's not the same as my Summicron 50mm f/2 on my IIIf, but it's surprising what you get for a 40$ lens.
Please, visit the following pictures, taken with my Leica Ic and the Jupiter 50mm:
OTOH, after the good experiences with the J8, I bought a Jupiter-12, a copy of the Zeiss 35mm Biogon. I can not tell if glass quality is good or not, because the images it produces are always out of focus, despite any adjustment on the focusing ring.
Of course, such experiments may be interesting, but only as experiments, nothing more.
Once again, i would never mount such a lens on my M.
In this domain, there is a widely distributed myth, wich consists in a simple and completely FALSE equation: russian military optical device quality=russian photo lenses quality. Very tempting, indeed, but not true; and it has never been so, even - and particulary - during the soviet period. One should not over-value those lenses: while certainly very good for their modest price, they never stand any comparison to the best german or japanese items - here they simply meet more than their match, either in terms of optical or mecanical construction.
The Jupiter 35mm f/2.8 is an exact clone of the Zeiss Biogon from the pre-War era. It's a coated lens, thankfully.
My own tests are that the Jupiter is excellent, perhaps one of the best Russian lenses. However, the rear element is huge and will block the metering cell of the M5 and CL and metering area of the CLE, M6, M7, MP.
Very good lens and could be mount on M2, M4, M4, M6 and M7. Yet, exprosure would not be accurate because the large and deep rear elements of the lens. Becareful the lens could not be mount on CL and M5 due to damaging the photo cell arm of the camera. Konica Hexar and Voigtlander R and R2 could be mounted.