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prime35mmdiscontinued

Pentax SMC 50mm f/1.4

Pentax · 1975-1997

Pentax's Super-Multi-Coating (SMC) technology delivers exceptional flare resistance. The M series version is remarkably compact with a clever built-in hood.

Known for

  • General photography
  • Street
  • Portraits
  • Low light

Considerations

  • Soft wide open
  • Some purple fringing on high contrast edges

Optical Characteristics

Sharpness (wide)
3/5
Sharpness (stopped)
5/5
Contrast
4/5
Flare Resistance
5/5
CA Control
3/5
Vignetting Control
3/5
Distortion Control
4/5

Bokeh: Smooth, pleasant

Rendering: Classic, natural

Color: Neutral to slightly cool

Versions

SMC K

1975-1977

K-mount, green 'K' marking

First K-mount version

SMC M

1977-1984

Compact design, built-in hood

Most common and desirable version

SMC A

1984-1997

A position on aperture ring

Adds program mode compatibility

The SMC M version is the most compact and has a built-in sliding lens hood, making it highly desirable.

Common Issues

  • Focus ring wear
  • Aperture ring loosening

Buying Guide

K-mount lenses work on modern Pentax DSLRs with full compatibility. Check focus smoothness and aperture clicks. M version commands slight premium for compactness.

Specifications

MountPentax K
Focal Length50mm
Max Aperturef/1.4
Min Aperturef/22
Aperture Blades8
Min Focus0.45m
Filter Size49mm
Weight235g

Optical Design

FormulaDouble Gauss
Elements7
Groups6
CoatingSMC (Pentax)

Pricing

£100 - £180

Typical used price

Mint: ~£250

Good value with modern DSLR compatibility

Adapts To

Sony EFujifilm XCanon RFPentax K (native)

Compatible Cameras

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Last verified: Jan 2026Report an error
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