# Super-Takumar 55mm f/1.8

- Brand: Asahi Pentax
- Mount: M42
- Focal length: 55mm
- Max aperture: f/1.8
- Optics: 6 elements / 5 groups
- Min focus: 0.45 m
- Filter thread: 49mm
- Production: c. 1962-1971
- Thoriated glass: reported (mildly radioactive; yellows with age; UV exposure largely reverses the cast)

The everyman Takumar: the 55/1.8 that came on most Spotmatics. Plentiful, cheap, and optically honest. Some later examples test mildly radioactive; most do not.

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Source: ShutterFile (https://shutterfile.com/m42/super-takumar-55-1-8/). Production dates are catalog-era approximations (c. = circa); independent reference, not affiliated with any manufacturer.