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Mamiya Sekor C 90mm f/3.8
Mamiya · 1970-1999
The Mamiya Sekor C 90mm f/3.8 is the standard lens for the RB67 system, roughly equivalent to 45mm on 35mm format (due to 6x7 format). Known for excellent sharpness and beautiful rendering. The workhorse lens for RB67 shooters.
Known for
- Portraits
- Documentary
- Studio work
- General purpose
Considerations
- RB67 system is large and heavy
Optical Characteristics
Sharpness (wide)4/5
Sharpness (stopped)5/5
Contrast4/5
Flare Resistance4/5
CA Control4/5
Vignetting Control4/5
Distortion Control5/5
Bokeh: Smooth, pleasant
Rendering: Classic medium format depth
Color: Warm Mamiya character
Common Issues
- Leaf shutter can become sluggish
Buying Guide
Test shutter at all speeds. "C" multicoated version preferred over older uncoated.
Specifications
MountMamiya RB
Focal Length90mm
Max Aperturef/3.8
Min Aperturef/32
Aperture Blades6
Min Focus0.5m
Filter Size77mm
Weight680g
Optical Design
FormulaPlanar
Elements6
Groups5
CoatingMulti-Coated
Pricing
£150 - £300
Typical used price
Mint: ~£400
Excellent value standard lens
Last verified: Jan 2025Report an error