The Canon EOS 650 is a 35 mmsingle-lens reflexcamera. It was introduced on 2 March 1987,Canon's 50th anniversary, and discontinued in February 1989. It was the first camera in Canon's new EOS series, which was designed from scratch to support autofocus lenses. The EOS system featured the new EF lens mount, which used electrical signals to communicate between the camera and the lens. Focusing and aperture control were performed by electric motors mounted in the lens body. The EF mount is still used on Canon SLRs, including digital models. Canon's previous FD mount lenses are incompatible with EOS bodies.
Canon's first EOS camera had the latest technologies, including a microprocessor and a Canon-developed BASIS sensor for high-precision AF. Canon claimed incomparable autofocusing for the EOS 650. A range of high-precision Ultrasonic Motor (USM) EF autofocus lenses were also developed successfully for the 650.