prime35mmvintage
SMC Pentax-M 28mm f/2.8
Pentax · 1977-1984
Pentax's compact wide-angle lens. Excellent sharpness and contrast with close focusing ability. The SMC coating handles flare superbly. A favourite for travel and street photography.
Known for
- Travel photography
- Street photography
- Landscapes
- Architecture
Considerations
- 5 aperture blades
- f/2.8 limits low light
Optical Characteristics
Sharpness (wide)4/5
Sharpness (stopped)5/5
Contrast5/5
Flare Resistance5/5
CA Control4/5
Vignetting Control4/5
Distortion Control4/5
Bokeh: Pleasant for wide angle
Rendering: Sharp, contrasty
Color: Neutral
Versions
Version I
1977-1982
Silver ring on focusing ring
156g, slightly lighter
Version II
1982-1984
No silver ring
170g
Two versions produced. Both optically identical. Scored highly in contemporary lens tests, outclassing more prestigious names.
Common Issues
- Focus ring wear
- Dust in rear group
Buying Guide
Very common and affordable. Check focus smoothness. Excellent performer for the price.
Specifications
MountPentax K
Focal Length28mm
Max Aperturef/2.8
Min Aperturef/22
Aperture Blades5
Min Focus0.3m
Filter Size49mm
Weight170g
Optical Design
FormulaRetrofocus
Elements7
Groups7
CoatingSMC (Pentax)
Pricing
£40 - £80
Typical used price
Mint: ~£110
Affordable wide-angle
Adapts To
Sony EFujifilm XCanon RFMicro Four Thirds
Compatible Cameras
Find This Lens
Last verified: Jan 2026Report an error