Medium format telephoto lens for Mamiya RB67 cameras.
The Mamiya Sekor R 180mm f/4.5 is a telephoto lens for the Mamiya RB67 medium format SLR system (6×7cm format), with R indicating the RB67 mount. The 180mm on 6×7cm gives approximately 90mm full-frame equivalent. The RB67 (Rotating Back 67) is known for its rotating back enabling horizontal/vertical composition without tilting the camera.
180mm focal length (approximately 90mm full-frame equivalent on 6×7cm), f/4.5 maximum aperture, Mamiya RB67 bayonet mount, 6×7cm medium format coverage.
The 180mm provides a moderate telephoto perspective on the 6×7cm format, useful for portrait and documentary work at medium distances. The Mamiya RB67 system's rotating back enables composition flexibility. The large 6×7cm negative provides exceptional image quality.
Inspect for fungus, haze, and coating condition. Confirm Mamiya RB67 bayonet engagement. Check aperture blades and leaf shutter if integral. Test focus helicoid smoothness.
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