prime35mmvintage
SMC Pentax-M 135mm f/3.5
Pentax · 1977-1986
Pentax's compact 135mm telephoto. Built-in sliding hood adds practicality. Sharp and contrasty with excellent SMC coating. The budget telephoto choice.
Known for
- Portraits
- Wildlife
- Events
- Budget telephoto
Considerations
- f/3.5 limits low light
- 1.5m minimum focus
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: Smooth telephoto
Rendering: Sharp, clean
Color: Neutral
Common Issues
- Hood mechanism wear
- Focus ring stiffness
Buying Guide
Very common and affordable. Check hood mechanism and focus smoothness. Excellent value telephoto.
Specifications
MountPentax K
Focal Length135mm
Max Aperturef/3.5
Min Aperturef/22
Aperture Blades8
Min Focus1.5m
Filter Size49mm
Weight276g
Optical Design
FormulaTelephoto
Elements5
Groups5
CoatingSMC (Pentax)
Pricing
£30 - £60
Typical used price
Mint: ~£90
Very affordable telephoto
Adapts To
Sony EFujifilm XCanon RFMicro Four Thirds
Compatible Cameras
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Last verified: Jan 2026Report an error