Lens · prime
Mamiya/Sekor Auto 55mm f/1.8
Mamiya
Vintage35mm
Mamiya/Sekor Auto 55mm f/1.8: 6 elements in 4 groups, 0.5m minimum focus, 52mm filter thread, 202g.
- Focal length
- 55mm
- Max aperture
- f/1.8
- Mount
- M42 Screw
- Format
- 35mm
- Elements / groups
- 6 / 4
Known for
- Portraits
- General photography
Considerations
- Manual focus and aperture (M42 SLR lens)
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 resistance3, level 3 of 5
CA control4, level 4 of 5
Vignetting control3, level 3 of 5
Distortion control4, level 4 of 5
Bokeh: Warm, pleasant rendering
Rendering: Sharp with warm character
Colour: Warm, inviting tones
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 | M42 Screw |
| Focal Length | 55mm |
| Max Aperture | f/1.8 |
| Min Aperture | f/16 |
| Min Focus | 0.5m |
| Filter Size | 52mm |
| Weight | 202g |
Optical design
| Formula | Double Gauss |
| Elements | 6 |
| Groups | 4 |
| Coating | unknown |
Pricing
- Typical used price
- £30 - £70
- Mint
- ~£100
Indicative, no dated source.