# Super-Multi-Coated Takumar 50mm f/1.4

- Brand: Asahi Pentax
- Mount: M42
- Focal length: 50mm
- Max aperture: f/1.4
- Optics: 7 elements / 6 groups
- Min focus: 0.45 m
- Filter thread: 49mm
- Production: c. 1971-1975
- Thoriated glass: yes (mildly radioactive; yellows with age; UV exposure largely reverses the cast)

The 7-element formula with Pentax's seven-layer Super-Multi-Coating, the coating that forced the whole industry to follow. Thoriated rear group; expect warm glass and check for yellowing.

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Source: ShutterFile (https://shutterfile.com/m42/smc-takumar-50-1-4/). Production dates are catalog-era approximations (c. = circa); independent reference, not affiliated with any manufacturer.