Pentax's autofocus medium format SLR — the 645N with reliable AF for professional 645 film photography.
The Pentax 645N is an autofocus medium format SLR camera for 645 film format, released in 1997. It represented a significant evolution of the original Pentax 645 with the addition of autofocus capability. The 645 format produces negatives approximately 2.7 times larger than 35mm, offering significantly improved resolution and tonal quality for professional work.
The AF system is functional and reliable for medium format work, with six AF points. Metering is accurate with matrix, centre-weighted, and spot options. The camera accepts Pentax 645AF lenses as well as manual focus 645 lenses with stop-down metering. Film advance is motorised. The mirror lockup function reduces vibration for critical sharpness on a tripod.
Pentax 645 mount with autofocus coupling. Uses 120 and 220 roll film in interchangeable film backs. Weight is approximately 1,300 grams body only — moderate for medium format. Build quality is professional grade with weather sealing. Battery-powered motor advance and AF system. The 645NII followed with minor improvements. Compatible with all Pentax 645 lenses.
Available on the used market at moderate prices — medium format film cameras have seen renewed interest. Check AF accuracy, motor operation, and film back light seals. An excellent entry to medium format film photography with the convenience of autofocus. The 645 format is the most practical medium format size for handheld shooting.