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Front and rear views of a Canon EF50mm f/1.4 USM. 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]
Canon FX with FL 50mm f/1.8. Canon FL refers to a lens mount standard for 35mm single-lens reflex cameras from Canon. It was introduced in April 1964 with the Canon FX camera, replacing the previous Canon R lens mount. The FL mount was in turn replaced in 1971 by the Canon FD lens mount. FL lenses can also be used on FD-mount cameras.
Canon EF 28–80mm lens: Kit lens for film-body Canon Elan series. The original version of this lens (with metal mount and full-time manual focus) is considered a vastly superior lens to later versions, however both were included as kit lenses. Canon EF-S 15–85mm lens: Canon EOS 60D, 7D; Canon EF-S 18–135mm lens: 550D, 60D, 70D, 7D ...
When used with a compatible lens, they will multiply the focal length of the lens by a factor of either 1.4x or 2x, at the cost of decreasing the lens' aperture by 1 or 2 stops respectively. For example, using a 1.4x or 2x extender with the Canon EF 500mm f/4L IS USM would result in a 700mm f/5.6 or 1000mm f/8 lens.
The lens has a self-contained autofocus system that does not require autofocus electronics in the camera body. Canon, unlike Minolta and Nikon , was convinced that having the motor in the lens was the optimal approach; this line of thinking continued with the new EOS system in 1987, which remains Canon's standard mounting system for SLRs today.
A fast prime (fixed focal length) lens, the Canon 50mm f / 1.4 (left), and a slower zoom lens, the Canon 18–55mm f / 3.5–5.6 (right); this lens is faster at 18mm than it is at 55mm. Lens speed is the maximum aperture diameter, or minimum f-number , of a photographic lens .
The NFL playoffs are nearly in sight and the heat is on for some teams still in the fight to make the postseason.. Week 15 saw the number of teams that have qualified for the playoffs increase to ...
The Canon T50, introduced in March 1983 and discontinued in December 1989, was the first in Canon's new T series of 35mm single-lens reflex cameras compatible with Canon's FD lens mount. SLR sales were falling in 1983 from the market's 1981 peak, and Canon chose to try greater automation to revive sales and remain competitive.
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