# Industar 50-2 50mm f/3.5

- Brand: KMZ (USSR)
- Mount: M42
- Focal length: 50mm
- Max aperture: f/3.5
- Optics: 4 elements / 3 groups
- Min focus: 0.65 m
- Filter thread: 35.5mm
- Production: c. 1968-1990s

The pancake Tessar copy: smaller than a film canister and often cheaper than a roll of film. The gateway lens of the whole vintage hobby.

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Source: ShutterFile (https://shutterfile.com/m42/industar-50-2/). Production dates are catalog-era approximations (c. = circa); independent reference, not affiliated with any manufacturer.