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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. DxOMark - Wikipedia

    en.wikipedia.org/wiki/DxOMark

    DXOMARK is a commercial website described as "an independent benchmark that scientifically assesses smartphones, lenses and cameras". [2] [3] Founded in 2008, DXOMARK was originally owned by DxO Labs, [4] a French engineering and consulting company, which is headquartered in Boulogne-Billancourt, Paris, France.

  4. 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.

  5. 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 .

  6. List of standard zoom lenses - Wikipedia

    en.wikipedia.org/wiki/List_of_standard_zoom_lenses

    Sony 28-70mm F3.5-5.6, a standard zoom lens. This is a list of standard zoom lenses that are designed for mirrorless cameras — limit one per brand, focal length, aperture, and zoom mechanism combination.

  7. List of Micro Four Thirds lenses - Wikipedia

    en.wikipedia.org/wiki/List_of_Micro_Four_Thirds...

    The Micro Four Thirds system (MFT) of still and video cameras and lenses was released by Olympus and Panasonic in 2008; lenses built for MFT use a flange focal distance of 19.25 mm, covering an image sensor with dimensions 17.3 × 13.0 mm (21.6 mm diagonal).

  8. 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]

  9. Canon EOS R - Wikipedia

    en.wikipedia.org/wiki/Canon_EOS_R

    The Canon EOS R camera uses the Canon RF lens mount. The following lens models were available at the release date: [32] Canon RF 35mm F1.8 Macro IS STM; Canon RF 50mm F1.2 L USM; Canon RF 24-105mm F4 L IS USM; Canon RF 28-70mm F2 L USM; A Canon EF lens mounted to the EOS R via a Mount Adapter EF-EOS R

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