| Yes it is m39 mount designed for Zenit 3M SLR but the lens has the same register as m42 lens, so I use this one with a M39 to M42 adapter ring, which costs 5 bucks. The lens focuses to infinity without any issues.
I also have the M42 mount version of this lens called Mir-1V which is a modern variant of Mir-1 but I found the newer one lacking in IQ. You can also find Mir-1 in M42 mount which are available in black or silver. |