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The standard lens was the 80mm f/2.8 C or the 70mm f/2.8 C E or the 80mm f/1.9 C. The metered prisms read the aperture dial through a mechanical coupling on the lens. A waist-level non-metered finder was available, as well as a non-metered pentaprism and three varieties of through-the-lens (TTL) metered prisms (CdS, PD and AE). Film was carried in cartridges that could be pre-loaded, but no capability existed to allow changing of film magazines mid-roll. The camera featured a mirror lockup, as well as selectable multi-exposure. It used an electronically controlled cloth focal plane shutter offering speeds of 8 seconds to 1/500 second in one-stop increments. The M645 was a true system camera, with interchangeable viewfinders and lenses. This was the first model to offer a 6x4.5 cm frame, allowing 15 shots on a standard 120 roll film. The M645 was manufactured from 1975 to 1987.The two generations use different viewfinders, grips, and other accessories that are not always cross-compatible. Mamiya 645 Super with power winder grip, AE prism N, and 80mm f/2.8 N lensĬenter-weighted, spot-metering, or computer-controlledĪll seven of the manual-focus Mamiya 645 cameras can use the same lenses and film inserts (film spools). Mamiya 645 Manual Focus System Mamiya 645 First Generation 1.3.10 Other accessories - Second Generation.1.3.9 Grips and Auto-winders - Second Generation.1.3.8 Camera backs / inserts - Second Generation.1.3.7 Viewfinder Accessories - Second Generation.1.3.5 Other accessories - First Generation.1.3.4 Grips and Auto-winders - First Generation.1.3.2 Viewfinder Accessories - First Generation.1.3 Mamiya 645 Manual Focus Accessories.