LOMO OKS1-50-6 2/50mm lens in Konvas OCT-19 mount, #900560
The lens comes in OCT-19 mount for Russian 35mm film movie cameras like Konvas-2M. Can be used with other cameras if you have corresponding adapter (non-reflex only due to long rear part).
The prime was made in 1990 (s/n 900560). f/2, T/2.3, focuses from 0.6m.
The lens is in very good used condition.
Aperture ring works fine. Diaphragm blades are covered with oil.
Focus ring works smoothly, with even effort to turn in the whole scale range.
Glass is clean and clear, just couple dust particles inside.