It was produced in a frame for the reproduction photo enlarger Belorus-2 (9 x 12 cm). Specifications: Focal Length 74.92 mm 55 ° angular field of view Front focal length 62.76 mm Rear focal length 65.82 Transmittance 0.80 Resolution power - center 35lin / mm, field 15lin / mm The largest diameter of the frame is 85 mm The Industar-58 3.5 / 75 lens is a reproduction four-lens anastigmat of medium aperture. Lenses are chemically enlightened (yellow enlightenment).
Product condition: Excellent condition, the lenses are clean without scratches and fungus. The mechanics are working properly.