This article is about an FD-mount 35mm SLR camera from the 1970s. For Canon's electrical autofocus lens mount introduced in the EOS series, see Canon EF lens mount.

The Canon EF is a manual focus 35mm single-lens reflex 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 doesn't support any motor drive for film transport.

The Canon EF contained a silicon photocell light meter with a range of EV 18 to EV -2 which measured light in a "central emphasis metering" pattern (also called center weighted average metering) with less influence from the top of the frame, to minimize underexposure due to a bright skyline. Note that this requires the camera to be held horizontally; taking vertically oriented pictures requires some care by the user. The Canon EF could operate "Variable Aperture AE" mode (commonly called shutter priority) or full manual mode, where the operator would control both the shutter speed and the aperture. When used in automatic mode, it's possible to lock the current aperture value, then recompose the picture, if desired.