Pentax smc FA 50mm F1.4 vs Vivitar 50mm f/1.8 Auto
Side-by-side comparison from our catalogue data. Better values are highlighted only where a clear difference exists.
Verdict at a glance
- Pentax smc FA 50mm F1.4 is faster by 0.7 stops (f/1.4 vs f/1.8), letting in more light.
| Spec | smc FA 50mm F1.4 | 50mm f/1.8 Auto |
|---|---|---|
| Brand | Pentax | Vivitar |
| Mount | Pentax K | Pentax K |
| Type | Prime | Prime |
| Focal length | 50mm | 50mm |
| Max aperture | f/1.4 (faster) | f/1.8 |
| Weight g | 220 | n/a |
| Filter mm | 49 | n/a |
| Length mm | 38.0 | n/a |
| Diameter mm | 64.0 | n/a |
| Min focus m | 0.45 | n/a |
Pentax smc FA 50mm F1.4
A compact 50mm f/1.4 for Pentax K-mount that covers full frame. It weighs about 220 g and takes 49mm filters.
Pros
- f/1.4 aperture
- Light at about 220 g
- Full-frame coverage
- 49mm filters
Cons
- Soft wide open
- Screw-drive autofocus
- Not weather sealed
Vivitar 50mm f/1.8 Auto
A 50mm f/1.8 fast standard prime lens, the Vivitar 50mm f/1.8 Auto is designed for Pentax K mount bodies. The natural field of view suits street, documentary and everyday photography.