Lens · prime
SMC Pentax-M 85mm f/2
Pentax · 1977-1984
Vintage35mm
Pentax's compact portrait lens. SMC Pentax-M 85mm f/2: 5 elements in 4 groups, 6 aperture blades, 0.85m minimum focus, 49mm filter thread, 251g.
- Focal length
- 85mm
- Max aperture
- f/2
- Mount
- Pentax K
- Format
- 35mm
- Elements / groups
- 5 / 4
Known for
- Portraits
- Events
- Available light
- Street portraits
Considerations
- f/2 only (no f/1.8 or f/1.4 version in M series)
- 6 aperture blades
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
Contrast5, level 5 of 5
Flare resistance5, level 5 of 5
CA control4, level 4 of 5
Vignetting control4, level 4 of 5
Distortion control5, level 5 of 5
Bokeh: Beautiful portrait blur
Rendering: Classic portrait character
Colour: Warm, flattering
Silverlog's editorial rating, 1 to 5; five is best. Not lab-measured.
Common issues
- Focus ring stiffness
- Dust in optical path
Buying guide
Check focus smoothness.
Specifications
| Mount | Pentax K |
| Focal Length | 85mm |
| Max Aperture | f/2 |
| Min Aperture | f/22 |
| Aperture Blades | 6 |
| Min Focus | 0.85m |
| Filter Size | 49mm |
| Weight | 251g |
Optical design
| Formula | Double Gauss |
| Elements | 5 |
| Groups | 4 |
| Coating | SMC (Pentax) |
Pricing
- Typical used price
- £80 - £150
- Mint
- ~£200
Indicative, no dated source.