LOMO RO501-1 F=100 1:2 — old Soviet (MADE IN THE USSR!) a movie projection lens. Like most similar lenses, it lacks a focusing mechanism and an aperture device. LOMO RO501-1 F=100 1:2 is a single naked lens unit.
LOMO RO501-1 F=100 1:2 has a weak sharpness and suffers from strong chromatic aberrations, is afraid of glare, yellow / green. At the same time, it has its own characteristic pattern. One of the main uses is portrait photography.