Jupiter 9 M39 vs M42


New to Mu-43
Dec 29, 2010
I need some help deciding between Jupiter M39 and M42. I have a GF1. I want a fast lens in the 85 mm range so decided to buy Jupiter 9. I would like to know if
1. Both the models give me same picture quality and
2. Any one of the models have any advantage regarding adapters for my GF1



Mu-43 Veteran
Apr 22, 2010
I have both; I like the silver M39 model better because it looks good on the camera! I suspect that IQ will depend more on the (good or bad) treatment that the individual samples have received than anything else.

Either is easily adaptable to m4/3.

Brian S

Mu-43 Top Veteran
Apr 11, 2009
The M39 version, M42 version, and Contax/Kiev version have the same optics. The M39 version is longer.

If you can find a gently treated 1950s J-9, optically better. My 1958 J-9 is as sharp as the Nikkor 8.5cm F2.

On a u43 camera, no problems with focus. On a Leica, the J-9 is made to the Zeiss standard and usually needs to be adjusted for use.

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