Lens has nice sharpness have aperture 4-16
Adjusted for M39 adapters. I use it with my Sony a7 via L39-NEX mount and I get full and minor overifinity focus
it fully cover FF sensor
Focusing 1m-infinity
Mount is M39 L39 size (only for mirrorless cameras) L39 mount + adapter Sony e mount and back cup
See the test shots, I took pictures on my Sony A6000