Mamiya Sekor C 55mm f/2.8 N Manual Focus Lens for 645 Review

The Mamiya Sekor C 55mm f/2.8 N is a standard manual focus lens for the Mamiya 645 medium format system, one of the most respected film camera platforms for professional and serious hobbyist photographers. With a 55mm focal length on the 645 format (roughly equivalent to a 35mm lens in full-frame terms), this lens delivers a moderately wide field of view well suited to environmental portraiture, reportage, and general-purpose shooting. The f/2.8 maximum aperture is modest by 35mm standards but typical for medium format glass, offering a practical balance of speed and sharpness.

As a legacy lens sourced from KEH in excellent condition, this optic represents a niche option for film shooters committed to the Mamiya 645 ecosystem or collectors looking to round out a kit. It will not work with modern digital systems without adapters and offers no autofocus or electronic communication. For those shooting 645 film, however, the Sekor C line is known for reliable build quality and competent optical performance. At this price point, the lens is priced in line with the used market for Mamiya 645 glass.