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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. Canon Extender EF - Wikipedia

    en.wikipedia.org/wiki/Canon_Extender_EF

    The 100 mm f/2 on the left is incompatible with Canon Extenders, unlike the 70-200mm f/2.8 IS on the right. 300mm f/2.8 IS lens, no extender 300mm f/2.8 IS lens, 1.4× extender 300mm f/2.8 IS lens, 2.0× extender. These Extender EF lenses can only be used with lenses that have a compatible mount.

  4. Lens speed - Wikipedia

    en.wikipedia.org/wiki/Lens_speed

    As of 2023, Canon also makes autofocus 50mm and 85mm f / 1.2 lenses, while Nikon makes a manual focus 58mm f / 0.95 lens and autofocus 50 and 85mm f / 1.2 lenses; see Canon EF 50mm lenses and Canon EF 85mm lenses for details. Pentax makes a 50mm f / 1.4 lens and 55mm f / 1.4 lens for APS-C cameras; see Pentax lenses.

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

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

    The Sigma 50mm f / 1.4 EX DG HSM is a normal prime lens made by the Sigma Corporation. The lens is produced in Canon EF mount , Four Thirds System , Nikon F-mount , Pentax K mount , Sigma's own SA mount , and the Sony/Minolta AF Mount varieties, all have the same optical formula.

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

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

    The Sigma 50mm f/1.4 DG HSM Art lens is a professional-level fixed focal length camera lens made by Sigma Corporation. [1] It was announced at CES in January 2014 and immediately became highly anticipated amid reports that Sigma was not aiming to compete against Canon or Nikon's 50mm prime lenses but rather the newly released Zeiss Otus 55/1.4, a lens costing US$4,000. [2]

  7. 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.

  8. Double-Gauss lens - Wikipedia

    en.wikipedia.org/wiki/Double-Gauss_lens

    The design is presently used in inexpensive-but-high-quality fast lenses such as the Sony FE 50mm f / 1.8, the Canon EF 50mm f / 1.8 and the Nikon 50 mm f / 1.8D AF Nikkor. It is also used as the basis for faster designs, with elements added, such as a seventh element as in both Canon [ 35 ] and Nikon's 50 mm f / 1.4 offerings [ 36 ] or an ...

  9. Canon EF lens mount - Wikipedia

    en.wikipedia.org/wiki/Canon_EF_lens_mount

    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.

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