With the EOS-1Ds (11.1 million pixels, 2002), EOS-1Ds Mark II (16.7 million pixels, 2004), EOS 5D (12.8 million pixels, 2005), and EOS-1Ds Mark III (21.1 million pixels, 2007), Canon has a proven track record as a leader in digital AF single-lens reflex cameras incorporating 35 mm full-frame CMOS sensors, making Canon the number-one choice among professional photographers. Professionals prefer the 35 mm full-frame format because it provides the same angles of view and perspectives as the film SLR cameras they have been familiar with for years. Canon understands what photographers want, and developed the full-frame CMOS sensor to fulfill that need.

Taking advantage of its proprietary technology, Canon offers CMOS sensors optimized according to camera user category. The latest model of the EOS-1D series, the EOS-1D Mark III released in 2007, has been enthusiastically received by news media professionals and incorporates an APS-H size CMOS sensor (28.1 x 18.7 mm/10.1 million pixels) with a normal ISO range of 100 to 3200 (extensible to ISO 50 and 6400). Featuring highspeed eight-channel signal reading and high-speed continuous shooting of approximately 10 frames per second enabled by the DIGIC III imaging processor, the EOS-1D Mark III achieves a new range of photographic representation far surpassing that offered by film cameras. Less advanced digital SLR cameras also incorporate an APS-C size CMOS sensor (22.2 x 14.8 mm/10.1 million pixels) with an ISO range of 100 to 1600, contributing significantly to the expansion of the global market for digital AF SLR cameras.