Monday, October 10, 2011

Sony NEX7 with Zeiss M-mount 21mm ZM

This is the test I'm most interested in. How does the NEX7 look with my M-mount Zeiss lenses.

I thought I would try the Sony NEX7 with every lens I had.

I'm not drawing any conclusions, just posting the images for you to enjoy.

The camera was the latest pre-production version which I just picked up this week.

The ISO was set to 100.

Camera on a man's size tripod.

Self-timer so I didn't jerk anything.

Everything was done on manual focus... used the scene enlarger to focus the best I could.

Aperture priority.


This is the Zeiss M-mount 21mm ZM at f2.8.

This is the Zeiss M-mount 21mm ZM at f8.

If you're interested in a M-mount Zeiss lens, then check out my retail store.

Rob Skeoch


  1. You can find the hi-rez file here....

  2. Looks like the NEX-7 is causing a purple color cast when this lens is open.

  3. You might be right. Seems to be something in there.

  4. Hi Rob,

    This is an interesting test. But unfortunately it shows clearly that the NEX-7 is not able to cope with wide M-mount lenses due to the lack of correction microlenses on the sensor (as opposed to Leica M8/M9 and Ricoh GXR M-mount module).

    Wide open not only the purple color cast is apparent, but also there is a substantial loss of resolution at the edges, where everything turns to be wish-washed. And I strongly believe that it is not because of the lens is so bad: according to the thorough review of Sean Reid on the Zeiss ZM 21/2.8 lens, its definite characteristics is that it retains resolution from corner to edge, already wide open (and he tested it on a Leica M8, where the crop factor is lower than that of the Sony NEX).