Canon Lenses

Canon 28 mm f/2.8 in FD lens mount

Canon 50 mm f/1.4 in FD lens mount

Canon lenses have their own style. There were several generations of Canon lenses: The very first style R bayonet mount (1959-1963) fit Canonflex, then they introduced the FL Bayonet mount (1964-1974) that fit Canon Pellix, then the later version FD mount (1970-1979) fit Canon FTb. The FL mount worked with stop down metering cameras, meaning that the diaphragm was closed down using a lever on the camera to measure proper exposure. FD lenses (below) were probably the most robust canon lenses ever made. They worked with full aperture metering on Canon FTb, and F-1, and AE-1. Then Canon offered the New FD lenses, switching from a high quality machined bayonet mount on FD lenses to a cheaper sheet metal. These lenses were turned to lock on camera body whereas the older generation, a ring around the rear of the lens turned to lock the lens in place. Then Canon introduced auto focus cameras, and their new line of Auto Focus lenses. Canon's next generation of lenses were EF Mount (1987-present) with auto focusing capability with Canon EOS cameras.

Canon got rid of all the mechanical links in their New EF mount (left) from older generation FD mount (above). It would take new schooling to repair modern lenses because so much electronics has been embedded inside the lens mechanics that make it impossible not to tear a flex board during disassembly. New Fuji lenses are a nightmare of tiny wires between the rear lens contacts, and its inner lens encoders, and sensors.

Canon 50 mm f/1.4 Autofocus lens in EF Mount (left), and its disassembly (above) shows the focus motor, and low cost/light weight  Teflon guides instead of the traditional helical design.