Quote Originally Posted by Xmas View Post
the Zeiss works lost their documentation when Dresden was torched so the Russians had no more design information than Canon had for their 5cm f/1.8 LTM
the post 1982 lenses will have been derived from Mandlers type IV Summicron
There's also the Mir 37/2.8, a Flektogon design and reputed to be very good. From what I've seen on the web, it is.
One reason I've acquired a couple screwmount bodies is to play a bit with these lenses which I've been curious about for a while now.