Wide-angle prime lens for Mamiya 645 medium format cameras.
The Mamiya Sekor 45mm f/2.8 N is a wide-angle prime for the Mamiya M645 medium format camera system (6×4.5cm format), equivalent to approximately 29mm on full-frame. The N designation indicates an updated version in the Mamiya 645 lens family. The 45mm provides a moderate wide-angle perspective for landscape and environmental work.
45mm focal length (approximately 29mm full-frame equivalent on 6×4.5cm), f/2.8 maximum aperture, Mamiya 645 bayonet mount.
The Mamiya 45mm f/2.8 N delivers a useful wide-angle on the 645 format with a relatively fast f/2.8 aperture for a medium format wide lens. The N generation typically indicates improved optical design or updated mechanical construction. A practical wide-angle for Mamiya 645 photographers.
Inspect for fungus, haze, and coating condition. Confirm Mamiya 645 bayonet engagement. Check aperture blades. Test focus helicoid smoothness.