Mamiya's ultra-wide for the RB67 — the Sekor C 50mm f/4.5 giving a dramatic wide perspective on 6x7.
The Mamiya Sekor C 50mm f/4.5 is a wide lens for the Mamiya RB67 medium format system — the 50mm provides wide-angle coverage on the 6x7 format. Mamiya RB mount.
50mm focal length (~29mm equivalent on 6x7). f/4.5 maximum aperture. Sekor C. Mamiya RB mount.
The Mamiya Sekor C 50mm f/4.5 is the wide-angle prime for the Mamiya RB67 — on 6x7 format, 50mm provides a wide-angle perspective (~29mm equivalent). f/4.5 is modest but expected for a wide medium format prime. The RB67 uses a leaf shutter in each lens enabling flash sync at all speeds.
On the used market the Mamiya Sekor C 50mm f/4.5 is a medium format wide prime. Condition checks: leaf shutter (all speeds), aperture. Mamiya RB mount.