Mamiya RB67 Pro-S

Medium FormatSLRMount: Mamiya RB
Introduced: 1974 Discontinued: 1990
Mamiya RB67 Pro-S
Image: Eusebius — CC BY 3.0

Mamiya RB67 Pro-S is the fully mechanical 6×7 medium-format SLR — in production 1974-1990 (Pro-S variant; the original RB67 Pro shipped 1970-1974 and the Pro-SD followed 1990-2003). The "RB" designation marks its defining feature: a Revolving Back that rotates between landscape and portrait without rotating the entire camera body — invaluable for studio and view-camera-style work where the camera is on a rigid rig.

Key features

  • 6×7 cm format on 120 (10 exp) or 220 (20 exp) — 4:5 aspect ratio that crops cleanly to 8×10 print proportions
  • Revolving back — landscape↔portrait without rotating camera
  • Bellows focus on body (not lens) — close focus standard, no extension tubes needed
  • Mamiya RB bayonet — accepts Mamiya Sekor C lens series
  • Fully mechanical — no battery required for any function
  • Leaf shutter built into each lens — 1s to 1/400, X-sync at all speeds

Practical notes

  • RB67 Pro-S bodies on used market: $400-800 with 90mm or 127mm Sekor lens
  • Heavy (~2.7 kg with 90mm) — a tripod is mandatory for most work
  • The Pro-S added multi-exposure prevention and improved film advance over the original Pro
  • Compatible with later RZ67 lenses via Mamiya's RZ-RB adapter (with stop-down metering)
  • Common service items: light-trap foam in film backs, mirror bumper foam

Native lenses

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