prime35mmdiscontinued
SMC Pentax-M 300mm f/4
Pentax · 1977-1984
Long telephoto for wildlife and sports. Well-built and sharp.
Known for
- Wildlife
- Sports
- Birds
Considerations
- Needs tripod
- Heavy
Optical Characteristics
Sharpness (wide)4/5
Sharpness (stopped)5/5
Contrast4/5
Flare Resistance4/5
CA Control3/5
Vignetting Control3/5
Distortion Control4/5
Common Issues
- Check for fungus
- Inspect aperture blades
Buying Guide
Specifications
MountPentax K
Focal Length300mm
Max Aperturef/4
Min Aperturef/32
Aperture Blades8
Filter Size67mm
Weight740g
Optical Design
FormulaTelephoto
Elements6
Groups6
CoatingSMC (Pentax)
Pricing
£120 - £220
Typical used price
Mint: ~£300
Adapts To
Sony EFujifilm XCanon RFMicro Four Thirds
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Last verified: Jan 2026Report an error