2/50mm lens OKS1A50-1 for anamorphic attachment, OCT-18 mount
The lens was made at Lenkinap factory (renamed to LOMO later) in 1957 (#571325).
F=50mm, f/2, T/2.6-16, no clicks.
The lens has special housing to be coupled with front anamorphic attachment like 35NAS4-1. It provides light-proof connection and focusing rings coupling.
It can be used as standalone prime lens, of course, but it is not very convenient for such use.
Very good used condition. Mechanics work fine, glass is clear. No fungus, no scratches. There are some dust particles and few cleaning marks, but nothing that can affect image quality.