prime35mmvintage
SMC Pentax-K 85mm f/1.8
Pentax · 1975-1977
A legendary Pentax portrait lens from the original K-series. Exceptional build quality with superb optical performance. The f/1.8 aperture provides excellent subject separation. Highly sought after by portrait photographers.
Known for
- Portraits
- Available light
- Creative bokeh
- Premium results
Considerations
- Expensive
- Heavier than M-series equivalent
Optical Characteristics
Sharpness (wide)4/5
Sharpness (stopped)5/5
Contrast5/5
Flare Resistance5/5
CA Control4/5
Vignetting Control4/5
Distortion Control5/5
Bokeh: Beautiful 8-blade rendering
Rendering: Superb portrait character
Color: Warm, flattering
Common Issues
- Focus ring stiffness
- Oil on aperture blades
Buying Guide
Premium lens commanding premium prices. Check aperture operation and focus smoothness. Worth the investment for serious portrait work.
Specifications
MountPentax K
Focal Length85mm
Max Aperturef/1.8
Min Aperturef/22
Aperture Blades8
Min Focus0.85m
Filter Size52mm
Weight334g
Optical Design
FormulaDouble Gauss
Elements6
Groups6
CoatingSMC (Pentax)
Pricing
£150 - £300
Typical used price
Mint: ~£400
Premium portrait lens
Adapts To
Sony EFujifilm XCanon RFMicro Four Thirds
Compatible Cameras
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Last verified: Jan 2026Report an error