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Mamiya Sekor C 150mm f/4 SF
Mamiya · 1977-1999
The Mamiya 150mm f/4 SF is a soft focus lens with adjustable spherical aberration. Creates a dreamy glow effect while retaining core sharpness. Popular for glamour and wedding portraits.
Known for
- Glamour portraits
- Wedding
- Fine art
- Romantic imagery
Considerations
- Not sharp in conventional sense
- Specialized use
Optical Characteristics
Sharpness (wide)3/5
Sharpness (stopped)4/5
Contrast3/5
Flare Resistance3/5
CA Control4/5
Vignetting Control4/5
Distortion Control5/5
Bokeh: Dreamy with glow
Rendering: Controlled spherical aberration
Color: Warm
Common Issues
- SF mechanism can jam
Buying Guide
Test soft focus mechanism. Specialized portrait lens.
Specifications
MountMamiya RB
Focal Length150mm
Max Aperturef/4
Min Aperturef/32
Aperture Blades6
Min Focus1.3m
Filter Size77mm
Weight950g
Optical Design
Formulaother
Elements5
Groups4
CoatingMulti-Coated
SpecialSoft focus mechanism
Pricing
£250 - £450
Typical used price
Mint: ~£550
Soft focus portrait lens
Last verified: Jan 2025Report an error