Lens · prime
Mamiya Sekor C 250mm f/4.5
Mamiya · from 1974
Discontinuedmedium-format
Mamiya Sekor C 250mm f/4.5: 5 elements in 4 groups, 77mm filter thread, 1020g.
- Focal length
- 250mm
- Max aperture
- f/4.5
- Mount
- Mamiya RB
- Format
- medium-format
- Elements / groups
- 5 / 4
Known for
- Portraits
- Nature
- Sports from distance
- Compressed landscapes
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)4, level 4 of 5
Sharpness (stopped)5, level 5 of 5
Contrast4, level 4 of 5
Flare resistance4, level 4 of 5
CA control4, level 4 of 5
Vignetting control4, level 4 of 5
Distortion control5, level 5 of 5
Bokeh: Compressed, smooth
Rendering: Good telephoto compression
Colour: Mamiya 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 | 250mm |
| Max Aperture | f/4.5 |
| Min Aperture | f/45 |
| Filter Size | 77mm |
| Weight | 1020g |
Optical design
| Formula | Telephoto |
| Elements | 5 |
| Groups | 4 |
| Coating | Multi-Coated |
Pricing
- Typical used price (US market)
- $250 - $450
- Mint
- ~$550
Indicative, no dated source.