# Pancolar 50mm f/1.8

- Brand: Carl Zeiss Jena (DDR)
- Mount: M42
- Focal length: 50mm
- Max aperture: f/1.8
- Optics: 6 elements / 5 groups
- Min focus: 0.35 m
- Filter thread: 49mm
- Production: c. 1965-1990
- Thoriated glass: reported (mildly radioactive; yellows with age; UV exposure largely reverses the cast)

Jena's fast fifty. Zebra-trim examples from the first years carry thoriated glass and the yellow cast that comes with it; later multicoated versions do not. Close focus to 0.35m embarrasses its rivals.

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Source: ShutterFile (https://shutterfile.com/m42/pancolar-50-1-8/). Production dates are catalog-era approximations (c. = circa); independent reference, not affiliated with any manufacturer.