blockend
Member
I have two of those, mistakenly sent (and refunded!) as M39 rangefinder Industar lenses. Completely different register, obviously, and they won't focus properly. I don't have a Zenit C to try them on, and doubt there's a 39mm SLR-to-anything adapter. Also own three M39 Industar rangefinder variations, including the 61 LD. Lovely lenses IMO, I prefer them to the Jupiter 8 (Biotar?) lenses. If they came with Western nomenclature they'd carry much fancier price tags.There was also the earlier M39 mount Industar used on the Zenit C which is the lens Helios was referring to.
Ian