prime120discontinued
Mamiya-Sekor C 90mm f/3.8
Mamiya · 1974-2004
The workhorse standard lens for the RB67 system. Excellent close-focus ability with bellows and revolving back makes this system ideal for portraiture.
Known for
- Portraits
- Studio
- Product
- Fashion
Considerations
- Heavy system
- Slow maximum aperture
- Requires careful handling
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, medium format depth
Rendering: Natural, medium contrast
Color: Neutral
Versions
Sekor C
1974-1990
C designation, early version
Original multi-coated version
KL
1990-2004
KL designation, improved coating
Final version, floating elements
The KL version has a floating element for improved close-focus performance.
Common Issues
- Shutter issues
- Bellows light leaks (camera)
- Aperture oil
Buying Guide
Test the leaf shutter carefully. The RB67 system is affordable entry to medium format but heavy. KL versions command premium.
Specifications
MountMamiya RB
Focal Length90mm
Max Aperturef/3.8
Min Aperturef/32
Aperture Blades8
Min Focus0.2m
Filter Size77mm
Weight700g
Optical Design
FormulaPlanar
Elements7
Groups5
CoatingMulti-Coated
Pricing
£150 - £300
Typical used price
Mint: ~£400
Affordable medium format entry
Adapts To
Sony EFujifilm GFX
Compatible Cameras
Find This Lens
Last verified: Jan 2026Report an error