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  2. Canon EF 50mm lens - Wikipedia

    en.wikipedia.org/wiki/Canon_EF_50mm_lens

    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]

  3. Lens speed - Wikipedia

    en.wikipedia.org/wiki/Lens_speed

    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 .

  4. Prime lens - Wikipedia

    en.wikipedia.org/wiki/Prime_lens

    Prime lenses have large apertures, compared with zoom lenses. These 85 mm lenses have maximum apertures of f /1.8 (left) and f /1.2 (right). In film and photography, a prime lens is a fixed focal length photographic lens (as opposed to a zoom lens), typically with a maximum aperture from f2.8 to f1.2. The term can also mean the primary lens in ...

  5. Canon FD lens mount - Wikipedia

    en.wikipedia.org/wiki/Canon_FD_lens_mount

    Canon FD 50 mm f /1.4 on AE-1 Program. Like its FL predecessor, the FD mount system allowed automatic diaphragm function, but in addition, a new signal pin supported full-aperture metering. A second signal pin for the "auto" setting of the aperture dial, plus a linkage to allow the camera to set the degree of diaphragm opening, enabled integral ...

  6. Sigma 50mm f/1.4 EX DG HSM lens - Wikipedia

    en.wikipedia.org/wiki/Sigma_50mm_f/1.4_EX_DG_HSM...

    With a 1.5× body such as the Nikon D300, it provides a less narrow field of view, equivalent to a 75 mm lens mounted on a 35 mm frame body. With a 1.3× body such as the Canon EOS-1D Mark III, it provides an even less narrow field of view, equivalent to a 65 mm lens mounted on a 35 mm frame body.

  7. Canon EF-M 32mm lens - Wikipedia

    en.wikipedia.org/wiki/Canon_EF-M_32mm_lens

    The EF-M 32mm f/1.4 STM is an interchangeable prime lens introduced by Canon in September 2018. The lens is based on the EF-M mount that is used in Canon's lineup of mirrorless cameras. It currently is the latest lens published that uses the EF-M lens mount. With a maximum value of f/1.4, it has the largest aperture of all Canon EF-M mount lenses.

  8. Canon FL lens mount - Wikipedia

    en.wikipedia.org/wiki/Canon_FL_lens_mount

    0.4 m (1.3 ft) (0.115×) 58: 63×55 mm (2.5×2.2 in) 352 g (12.4 oz) FL 35mm f/3.5: f /3.5–16: May 1968: 6/6: 0.4 m (1.3 ft) (0.106×) 48: 62×43 mm (2.4×1.7 in) 270 g (9.5 oz) 38 FLP 38mm f/2.8: f /2.8–16: May 1965: 4/3: 0.8 m (2.6 ft) (0.054×) 48: 66×21 mm (2.6×0.8 in) 210 g (7.4 oz) [b] Normal lenses [c] 50 FL 50mm f/1.4: f /1.4–16 ...

  9. Canon FD 55mm f/1.2 AL - Wikipedia

    en.wikipedia.org/wiki/Canon_FD_55mm_f/1.2_AL

    The Canon FD 55mm ƒ/1.2 AL is a camera lens made by Canon, first introduced alongside the Canon F-1 single-lens reflex camera in March 1971. It was the first lens for any 35mm SLR system to incorporate an aspherical element. [1] The lens was manufactured until 1980.

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