Wide-angle Mamiya 645 lens with f/2.8 aperture and leaf shutter — 28mm equiv on 645.
The Mamiya Sekor 45mm f/2.8 N is a wide-angle lens for the Mamiya 645 medium format system, providing approximately a 28mm equivalent perspective. The relatively fast f/2.8 aperture provides a bright viewfinder image and useful depth-of-field control on the 6x4.5cm format for landscape and architectural photography.
Optical quality is good with the multi-coated Sekor formula delivering sharp images with accurate colour. The leaf shutter enables flash sync at all speeds, valuable for studio and location work. The wide-angle perspective on medium format creates images with both dramatic framing and the detail richness that larger formats provide.
Build quality follows Mamiya 645 professional standards with solid metal construction and reliable mechanical operation. The N designation indicates a later version with improved optics. The bayonet mount ensures secure attachment to all Mamiya 645 system bodies from manual to autofocus variants.
On the used market, the Mamiya Sekor 45mm f/2.8 N offers wide-angle medium format capability at accessible prices. For Mamiya 645 users wanting a quality wide-angle lens for landscape and architectural work, it provides solid performance at prices significantly below competing Hasselblad or Phase One alternatives.