Mechanicals: 4 / 54
Battery: PX625A / LR9 / V625U 1.5V
The Canon EF is a manual focus 35mm SLR camera produced by Canon between 1973 and 1978. It was compatible with Canon's FD-mount lenses. The EF was built as an electronic version of Canon's top-of-the line F-1 camera. Because of this, the EF shares the F-1's rugged construction and tough metal body. Unlike the F-1, the EF does not support any motor drive for film transport. Neither does it provide any interchangeable viewfinder.
The EF used a unique shutter among Canon's 35mm SLRs, a Copal Square vertical-travel metal blade focal plane shutter. Unusually long exposures (from 1 second to 30 seconds) were electronically controlled, while shorter ones (1/1000 second to 1/2 second) were mechanically controlled.