Canon EF 1200mm Lens
The EF 1200mm f/5.6L USM is a super-telephoto prime lens that was made by Canon Inc. It uses an EF mount, and is compatible with the Canon EOS camera range. It has a focal length of 1200 mm and so on a digital body with a sensor size of 22.5 mm × 15 mm (called 1.6× crop), such as a Canon EOS 40D or 450D, it provides a 35 mm field of view equivalent to that of a 1920 mm lens. With a body with a sensor size of 28.8 mm × 19.2 mm (called 1.3× crop), such as a Canon EOS-1D Mark IV, the field of view is equivalent to that of a 1560 mm lens.
The lens was aimed at sports and wildlife photographers, and is both extremely expensive and extremely rare. Canon described it as "the world’s largest interchangeable SLR AF lens, in terms of both focal length and maximum aperture."
Read more about Canon EF 1200mm Lens: Technical Information
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