Pentax SMC Pentax-M 50mm f/1.4
Introduced: 1977
SMC Pentax-M 50mm f/1.4 is Pentax's fast standard prime in the compact M-series — the brighter alternative to the f/1.7 sibling, delivering shallow DOF for portrait and available-light work. Pentax SMC coatings reduce flare and ghost reflections compared to uncoated equivalents.
Key features
- 50mm focal length on 35mm full-frame
- f/1.4 maximum aperture
- 49mm filter thread
- Pentax K bayonet with SMC coating
- 7-element double-Gauss design
Use case + rendering
- Standard prime for portraits, available-light
- Slight glow wide-open; sharp by f/2.8
- The Pentax counterpart to Nikkor 50/1.4 and FD 50/1.4
Compatible bodies
Related lenses
- SMC Pentax-M 50mm f/1.7 — slower kit alternative
- SMC Pentax-A 50mm f/1.7 — A-series sibling with full AE compatibility
- SMC Pentax-M 28mm f/2.8 — wider alternative