Mamiya Sekor C 50mm f/4 Shift Manual Focus Lens for 645 Review

The Mamiya Sekor C 50mm f/4 Shift is a specialized manual focus lens designed for the Mamiya 645 medium format system. With a 77mm filter thread and shift capability, it addresses architectural and product photography needs where perspective control is essential. The f/4 maximum aperture is modest but typical for shift lenses, which prioritize optical correction over speed.

This is a legacy manual focus optic, meaning it's aimed squarely at users already invested in the Mamiya 645 ecosystem or those seeking affordable medium format perspective control. At $355 in excellent-plus used condition, it occupies a niche slot for film shooters and collectors. The shift mechanism allows for vertical or horizontal movements to correct converging lines without tilting the camera, a core tool for interiors, facades, and technical work where straight lines matter.