Lens · prime
Mamiya Sekor C 150mm f/4 SF
Mamiya · from 1974
Discontinuedmedium-format
Mamiya Sekor C 150mm f/4 SF: 5 elements in 3 groups, 77mm filter thread, 840g.
- Focal length
- 150mm
- Max aperture
- f/4
- Mount
- Mamiya RB
- Format
- medium-format
- Elements / groups
- 5 / 3
Known for
- Glamour portraits
- Wedding
- Fine art
- Romantic imagery
Considerations
- Leaf shutter in the lens: cock the camera and lens shutters before mounting
Optical characteristics
Silverlog's editorial rating: our own judgement, not measured data.
Sharpness (wide)3, level 3 of 5
Sharpness (stopped)4, level 4 of 5
Contrast3, level 3 of 5
Flare resistance3, level 3 of 5
CA control4, level 4 of 5
Vignetting control4, level 4 of 5
Distortion control5, level 5 of 5
Bokeh: Dreamy with glow
Rendering: Controlled spherical aberration
Colour: Warm
Silverlog's editorial rating, 1 to 5; five is best. Not lab-measured.
Buying guide
Check the leaf shutter fires at all speeds, the aperture and focusing smoothness, and the condition of the glass.
Specifications
| Mount | Mamiya RB |
| Focal Length | 150mm |
| Max Aperture | f/4 |
| Min Aperture | f/32 |
| Filter Size | 77mm |
| Weight | 840g |
Optical design
| Formula | other |
| Elements | 5 |
| Groups | 3 |
| Coating | Multi-Coated |
| Special | Soft focus mechanism |
Pricing
- Typical used price (US market)
- $250 - $450
- Mint
- ~$550
Indicative, no dated source.