The Pentax 645D is a

medium format Medium format has traditionally referred to a film format in photography and the related cameras and equipment that use film. Nowadays, the term applies to film and digital cameras that record images on media larger than the used in 35&nbs ...

digital SLR A digital single-lens reflex camera (digital SLR or DSLR) is a digital camera that combines the optics and the mechanisms of a single-lens reflex camera with a digital imaging sensor. The reflex design scheme is the primary difference between a ...

camera announced by

Pentax is a brand name used primarily by the Japanese multinational imaging and electronics company Ricoh for DSLR cameras, lenses, sport optics (including binoculars and rifle scopes), and CCTV optics. The Pentax brand is also used by Hoya Corporation ...

on March 10, 2010. Unlike other medium-format DSLRs, which accept

digital camera back A digital camera back is a device that attaches to the back of a camera in place of the traditional negative film holder and contains an electronic image sensor. This lets cameras that were designed to use film take digital photographs. These ...

s of different resolutions or even manufacturers, the 645D has a fixed-back design similar to smaller full-frame and

APS-C Advanced Photo System type-C (APS-C) is an image sensor format approximately equivalent in size to the Advanced Photo System film negative in its C ("Classic") format, of 25.1×16.7 mm, an aspect ratio of 3:2 and Ø 31.15 mm field d ...

DSLRs. The fixed back allows the 645D to be fully weather-sealed.

Awards

The 645D was awarded the Camera of the Year award at the Camera Grand Prix Japan 2011. Pentax celebrated this with the release of a limited edition of the camera.

References

*http://www.dpreview.com/products/pentax/slrs/pentax_645d/specifications {{camera-stub 645D Cameras introduced in 2010