Seiki Kogaku (now Canon) began to develop and subsequently to produce rangefinder cameras with the Kwanon prototype in 1933, based on the Leica II 35mm camera, with separate rangefinder and view finder systems (3 windows).
Production began with the Hansa Canon on the Leica III format through World War II.
Post war, Canon resumed production of pre-war designs in early 1946 with the JII viewfinder and the S1 rangefinder.
But in late 1946 they introduced the SII which departed from the Leica design by offering a combined viewfinder/rangefinder system, reducing the windows on the front of the camera to two.
Through the lens metering was center weighted and automatic exposure was shutter speed priority.
In 1987, Canon introduced the EOS Single-lens reflex camera system along with the EF lens-mount standard to replace the 16-year-old FD lens-mount standard; EOS became the sole SLR camera-system used by Canon today[update].
All current film and digital SLR cameras produced by Canon today[update] use the EOS autofocus system.
Beginning in Spring 1993, Canon produced a series of notebooks with integrated inkjet printers called NoteJet.
[11] The NoteJet lineup was eventually discontinued, and computers belonging to the series are valued by collectors.
The company claims that its use of data compression reduces their printer's memory requirement, good quality compared to conventional laser printers, and also claim that it increases the data transfer rate when printing high-resolution graphics.
The "X" denotes models sold under special dispensation by retail outlets in Europe.
When EF-S lenses are used on a 35mm (full frame) camera the back element will hit the mirror assembly or cause substantial vignetting since the sensor is bigger than the image produced by the lens.