Since 1975, when Mamiya introduced their first 6x4.5 film format camera, it has set the standards for quality, value, versatility, efficiency and simplicity. . The Mamiya M645J camera is a solidly built, user-friendly, professional full-system medium format SLR offering a complete line of components and accessories including twenty-one lenses (plus a 2x teleconverter), interchageable viewfinders (both metered and non-metered), diopters, a power drive grip, interchangeable focusing screens and a bellows system for close-up photography. In addition, the camera offers multiple exposure and mirror lock-up. This system is perfect for advanced amateurs and demanding professional photographers.
This camera consists of a Mamiya M645J body, an 80mm f/2.8 lens, a CDS (metered) Prism Finder viewfinder and an insert for 120 size film.
| Camera Type | Manual focus, electronically controlled horizontal focal-plane shutter, Single-Lens-Reflex camera |
| Format | 6 x 4.5cm; Image size is 56 x 41.5mm (2 1/4 x 1 5/8") |
| Film Back/Loading | Interchangeable INSERTS ONLY. 120 and 220 Film inserts available. This camera does not have interchangeable backs. |
| Film Type | 120 roll film (15 exposure), 220 roll film (30 exposure) |
| Lens Mount | Mamiya M645 bayonet mount. NOTE: Depth-of-field preview for the complete 645 manual focus system is achieved through a switch on each lens |
| Shutter | Electronically controlled horizontal focal-plane shutter; Shutter speeds 1 second to 1/500 second plus "B" (Bulb) |
| Shutter Release | Accepts standard mechanical cable releases. Camera offers a shutter release button in the standard lower front position. |
| Self Timer | No |
| Flash Synchronization | Sync speed is 1/60 sec; Body contains "PC" terminal (for external electronic flash connection ONLY) |
| Mirror Lock-Up | No |
| Exposure Metering | Included CDS Metered Prism Viewfinder offers through-the-lens, full aperture, center-weighted metering; Exposure meter indicator needle viewable in finder for correct exposure; with f/2.8 lens, EV 4-18 (f/2.8, 1/2 sec. - f/16, 1 1/1000 sec.; camera body battery serves as power source. ASA (ISO) range 25-6400. Power source: MS76, SR44 or equivalent 1.5v silver oxide (recommended) or Alkaline battery in chamber on rear of viewfinder. |
| Exposure Bracketing | None |
| Depth-of-Field Preview | Depth-of-field preview for the M645J system is achieved through a switch on each lens |
| Viewfinder | 94% of actual field-of-view |
| Viewfinder Info | Red and Green diodes foe proper exposure |
| Film Transport | Film winding crank (single turn) supplied with body |
| Multiple Exposure | Yes, using switch on right side of body; Possible to expose same frame any number of times |
| Focusing System | Helicoid (manual rotating mount)on lens |
| Power Source | Uses PX28 silver oxide (recommended), PX28L lithium, 4LR44 alkaline; Battery Check button "B.C." illuminates green LCD if battery condition is satisfactory. Included CDS viewfinder uses a separate MS76 or equivalent 1.5v battery. |
| Custom Functions | None |
| Data Imprinting | None |
| Tripod Mount | 1/4" |
| Dimensions |
(WxHxD) Body with Prism Finder and 80mm f/2.8 lens, 110 x 125 x 166.5mm (4.6 x 5 x 6") |
| Weight | 3 lbs 10.9 oz |