Pentax's final autofocus 645 film SLR — focal-plane shutter, AF, mirror-up, 2001.
The Pentax 645NII is a 2001 medium-format SLR, the final film body in Pentax's autofocus 645 system. It refined the 645N with a mirror-up function and other detail changes, continuing a line designed to bring autofocus and automated exposure to the 6x4.5 format in a body that handles like a large 35mm SLR.
It is a medium-format (6x4.5) SLR producing a 56x42mm frame on 120 or 220 film loaded via inserts in a fixed body rather than fully removable magazines. It uses a body focal-plane shutter and offers autofocus, TTL metering, and program, aperture-priority, shutter-priority, and manual exposure modes. It has a fixed prism finder and mounts Pentax 645 autofocus bayonet lenses, and is electronically controlled and battery-dependent.
The autofocus, automation, and built-in film advance made the 645NII the most 35mm-like of the medium-format SLRs here, suiting portrait, landscape, and location photographers who wanted medium-format quality with modern handling. The mirror-up function added for this model helps sharpness on a tripod.
Since the body is electronic, confirm it powers up, autofocuses, meters, and fires correctly on fresh batteries. Test the focal-plane shutter across speeds, the autofocus and metering, and the mirror-up function. Check the film insert and its seals, the fixed prism finder for haze, and the focusing screen; verify the data-imprint and drive functions work.