shawn
Veteran

Just received this lens from KEH. I lucked out as it turned out to be the latest M-Series version. That had revised optics and focuses to .75m. It is a retrofocus design. My hope was for it to work better on digital bodies than the Voigtlander 21mm f4. The Voigtlander smears the sides on the m240 and is much worse on the Sony A7RII. It will also color shift in some situations.
Initial tests are very encouraging.

M240 top right corner at 100% f4

M240 top right corner at 100% f5.6

M240 top right corner at 100% f8
And on the Sony A7RII

A7RII top right corner at 50% f4

A7RII top right corner at 50% f5.6

A7RII top right corner at 50% f8

A7RII top right corner at 50% f11
Shawn