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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]
The Canon Extender EF 1.4x II Image of the Canon 2x III Extender. The Canon Extender EF lenses are a group of teleconverter lenses made by Canon. These lenses are used between any compatible EF type lens and any of the Canon EOS line of cameras. When used with a compatible lens, they will multiply the focal length of the lens by a factor of ...
For example, the Canon EF 50mm f / 1.8 II or Nikon AF Nikkor 50mm f / 1.8D are very inexpensive, but quite fast and optically well-regarded. Old fast manual focus lenses, such as the Nikkor-S(C) or Nikkor AI-S 50mm f / 1.4, or Canon's FD and M39 counterparts, were historically produced abundantly, and are thus sold relatively inexpensively on ...
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The "S" in EF-S has variously been described by Canon as coming from either "Small image circle" [1] (the lens projects a smaller image circle than normal EF lenses to match the sensor), or "Short back focus" [2] (the smaller mirror used in APS-C cameras also allows optical elements to protrude further into the camera body, reducing the minimum ...
Download as PDF; Printable version; ... Canon TS-E 50mm lens; Canon TS-E 90mm lens; Canon TS-E 135mm lens; M. Canon MP-E 65mm f/2.8 1–5x Macro; P.
In 1987 Canon was the first to use USM (Ultrasonic Motor) with the Canon EF 300mm f/2.8L USM. [19] In 1989 Canon was the first to create a full frame f/1.0 AF (AutoFocus) lens and the only one until today with the Canon EF 50mm f/1.0L USM. In 1993 Canon was the first to create an interchangeable 10× superzoom lens for SLR cameras.
Canon New FD lens mounting surface.. The FD lens mount is a breech-lock mount, which is a variation of the common triple-flanged bayonet attachment. The advantage of the breech-lock over the bayonet is that neither the contact surfaces between the body and lens, nor the signalling mechanisms, rotate against each other when the lens is mounted.