Canon EOS (Electro-Optical System) is a 35mm SLR camera introduced by Canon in 1987 and currently in use, built around attacking Canon EF. It replaces the previous system built around attacking Canon FD.
The EOS system includes autofocus 35mm SLR cameras and digital format 24x36, APS-H and APS-C. The first was the Canon EOS camera EOS 650. The acronym EOS was chosen in reference to Greek mythology, where the name Eos is the goddess of dawn. It is often pronounced as one word, although it is equally correct to spell individual letters since both rulings make sense logically.
From the commercial point of view, the Canon EOS system is in direct competition with the Nikon F series and its subsequent developments, as well as autofocus SLR systems products by Olympus, Pentax, Sony / Minolta and Panasonic / Leica. In many countries, the EOS cameras have captured the market share larger than its competitors.
The heart of the EOS system is the EF bayonet which replaced the aforementioned graft FD. The reasons for this rotation are mainly related to the introduction autofocus in the second half of the eighties of the twentieth century. This new technology, marketed by Minolta in 1985, led Canon to implement making an attack from scratch, instead of modifying the graft FD, similar to what has been done by Minolta in 1985 and unlike Nikon decided that instead of update its thirty bayonet F. This choice, though risky, was repaid by the superiority that the system created from scratch knew vouch for competing systems. Bold design choices such as built-in motor lens and exclusive patents provide an excellent autofocus and unmatched by other brands so that between the late eighties and nineties of the twentieth century, the majority of professional photographers went to the Canon system. At the end of the twentieth century, the design philosophy inaugurated by the Canon EOS system had become standard even among all the other 35mm SLR manufacturers.
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