Fast lenses RO-51 2.8/2cm "P" and Industar-50 3,5/5cm "P" in excellent condition. Produced at LZOS in 1957.
RO-51 2.8/2cm and Industar-50 3.5/5cm, optical design 4 lenses in 3 groups, for amateur and professional film cameras working on 16 mm film with a frame size of 7.5x10.4 mm. Thread M27x0.75. The objective lenses are chemically coated. The number of aperture blades is 7 pieces (8 for Industar-80). Well suited for solving various creative resolving.