Overview

The Industar 90U 75mm f/4 is an enlarging lens for 6x6 cm negatives. It offers moderate sharpness but may exhibit optical weaknesses such as softness at wider apertures. Build quality is typical of Soviet-era lenses, with a metal construction and manual aperture ring. Handling is basic, suited for darkroom use. This lens is ideal for photographers needing a budget enlarging lens for medium format, though it may not satisfy those seeking high contrast or resolution.