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  2. Sony FE 200-600mm F5.6-6.3 G OSS - Wikipedia

    en.wikipedia.org/wiki/Sony_FE_200-600mm_F5.6-6.3...

    The Sony FE 200-600mm F5.6-6.3 G OSS is a premium, variable maximum aperture full-frame telephoto zoom lens for the Sony E-mount, announced by Sony on June 11, 2019. [ 1 ] [ 2 ] The Sony 200-600mm lens is currently the longest focal length native zoom lens offered for the Sony E-mount.

  3. Sigma 60-600mm f/4.5-6.3 DG OS HSM lens - Wikipedia

    en.wikipedia.org/wiki/Sigma_60-600mm_f/4.5-6.3...

    The 60–600mm lens is produced in two versions: one exclusively for single lens reflex cameras, with Canon EF mount, Nikon F mount, and Sigma SA mount versions, named the 60–600mm F4.5-6.3 DG OS HSM | S, and one exclusively for mirrorless cameras, in Leica L-Mount and Sony E-mount versions, named the 60–600mm F4.5-6.3 DG DN OS | S.

  4. Sony FE 100-400mm F4.5-5.6 GM OSS - Wikipedia

    en.wikipedia.org/wiki/Sony_FE_100-400mm_F4.5-5.6...

    The Sony FE 100-400mm F4.5-5.6 GM OSS is a premium, variable maximum aperture full-frame telephoto zoom lens for the Sony E-mount, announced by Sony on April 19, 2017. [ 1 ] [ 2 ] The FE 100-400mm GM lens is currently the second longest focal length native zoom lens offered for the Sony E-mount, only surpassed by the Sony 200-600mm G lens.

  5. 35 mm equivalent focal length - Wikipedia

    en.wikipedia.org/wiki/35_mm_equivalent_focal_length

    35 mm equivalent focal lengths are calculated by multiplying the actual focal length of the lens by the crop factor of the sensor. Typical crop factors are 1.26× – 1.29× for Canon (1.35× for Sigma "H") APS-H format, 1.5× for Nikon APS-C ("DX") format (also used by Sony, Pentax, Fuji, Samsung and others), 1.6× for Canon APS-C format, 2× for Micro Four Thirds format, 2.7× for 1-inch ...

  6. Telephoto lens - Wikipedia

    en.wikipedia.org/wiki/Telephoto_lens

    A telephoto lens, also known as telelens, is a specific type of a long-focus lens used in photography and cinematography, in which the physical length of the lens is shorter than the focal length. [ 1 ] : 93 This is achieved by incorporating a special lens group known as a telephoto group that extends the light path to create a long-focus lens ...

  7. Crop factor - Wikipedia

    en.wikipedia.org/wiki/Crop_factor

    For example, a 28 mm lens delivers a moderately wide-angle FOV on a 35 mm format full-frame camera, but on a camera with a 1.6 crop factor, an image made with the same lens will have the same field of view that a full-frame camera would make with a ~45 mm lens (28 × 1.6 = 44.8). This narrowing of the FOV is a disadvantage to photographers when ...

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