Condition: Very good. Bellows are clean, prism is clean. Minor marks are on the body but overall it’s in great condition. The lens is also in great condition.

The Mamiya RB67 Pro S is a medium format camera system popular among professional photographers for studio and portrait work due to its versatility and high image quality. Here are the key specifications:

General Specifications:

• Type: Medium format single-lens reflex (SLR) camera

• Film Format: 120 and 220 roll film (6x7 cm negatives)

• Lens Mount: Mamiya RB Bayonet mount

• Viewfinder: Waist-level finder (standard), with optional prism finders

• Focus System: Manual focusing with bellows focusing mechanism, rack-and-pinion driven

• Shutter: Mechanical, in-lens Seiko #1 leaf shutter

• Shutter Speeds: 1 second to 1/400 seconds, plus Bulb (B) mode

• Flash Sync: X-sync at all speeds

Camera Body:

• Dimensions: Approx. 104mm x 114mm x 216mm (without lens and finder)

• Weight: Approx. 2,700g (without lens and film back)

Lens System:

• Lenses: Interchangeable Mamiya Sekor lenses, typically available from 50mm to 360mm

• Aperture: Dependent on the lens; typically f/3.5 to f/32

• Focusing Mechanism: Bellows focusing with a rotating back for horizontal and vertical compositions

Film Backs:

• Interchangeable Film Backs: Rotating back allows for switching between horizontal and vertical formats without turning the camera

• Film Advance: Manual film advance with a crank, can advance one frame at a time

• Film Counter: Automatic reset when the film back is removed

Special Features:

• Mirror Lock-Up: Reduces camera shake during exposure

• Double Exposure Prevention: Automatic mechanism prevents double exposures

• Revolving Back: The back can be rotated 90 degrees, allowing for easy switching between landscape and portrait orientation

• Multi-Exposure Capability: The camera allows for multiple exposures on the same frame

• Interchangeable Finders and Screens: Various finders and focusing screens available for different shooting situations

The Mamiya RB67 Pro S is known for its modular design, allowing users to customize the camera to their needs with a wide range of lenses, finders, and accessories. The large 6x7 negatives it produces are prized for their detail and tonal range.