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Canon EF 50mm lens
Family of camera lens / From Wikipedia, the free encyclopedia
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The EF 50mm lenses are a group of normal prime lenses made by Canon that share the same focal length. These lenses are based on the classic double-Gauss lens,[1] with the f/1.8 being a standard six-element double-Gauss with an air gap and powers between element 2 and 3[1] and its faster cousins adding additional elements.[2] The 50mm focal length, when used with a 35mm film or full-frame sensor, has been widely considered to match the perspective seen by the human eye.[3]
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Canon 50mm lenses have an EF type mount that fits the Canon EOS line of cameras. When pairing a 50mm lens to a Canon DSLR with an APS-C sized sensor, the crop factor effectively turns the 50mm focal length into an 80mm field of view.
Seven EF 50mm lenses have been sold by Canon: