Lenkinap 2.8/18mm lens RO71-1, #590196
Quite rare version of Lenkinap (renamed to LOMO later) 18mm lens made in 1959 (#590196). Large front element, small rear element. f/2.8, T/3.5. Weight is 480 g.
Excellent optical condition. There are just few cleaning marks.
The lens has self-made focusing mount similar to PSK (animation cameras with focal-plane shutter). You'll need to modify it. It will not work with reflex cameras, but can be adapted to some mirrorless camera.