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  2. Canon RF lens mount - Wikipedia

    en.wikipedia.org/wiki/Canon_RF_lens_mount

    Canon full-frame cameras have used the EF lens mount since 1987. In comparison with that mount, the RF mount's inner diameter is the same at 54 mm. [1] The RF mount's flange focal distance at 20 mm is much shorter than that of the Canon EF and EF-S mounts at 44 mm.

  3. Canon EF 500mm lens - Wikipedia

    en.wikipedia.org/wiki/Canon_EF_500mm_lens

    A 9 bladed maximum aperture of f / 4.5, gives this lens the ability to create depth of field effects. The optical construction of this lens contains 8 lens elements, including one fluorite lens element, and one UD (Ultra low Dispersion) lens element. This lens uses an inner focusing system, powered by a ring type USM motor. The front of the ...

  4. Lenses for SLR and DSLR cameras - Wikipedia

    en.wikipedia.org/wiki/Lenses_for_SLR_and_DSLR...

    For example, a 100 mm to 400 mm lens may have a maximum aperture of f/4.0 at the 100 mm end but will diminish to only f/5.6 at the 400 mm end of the zoom range. Zoom lenses with constant maximum apertures (such as f/2.8 for a 24–70mm lens) are usually reserved for lenses with higher build quality and are thus more expensive than those with ...

  5. List of Canon products - Wikipedia

    en.wikipedia.org/wiki/List_of_Canon_products

    Canon RF 100-300mm F2.8 L IS USM: 2023-04-20 5.5 stage stabilizer: 100 300 112 323.4 128 2590 22 1.8 0.16 Canon RF 100-500mm F4.5-7.1 L IS USM: 2020-09-01 4 stage stabilizer: 100 500 77 207.6 93.8 1530 54 32 0.9 0.33 Canon RF 100-400mm F5.6-8 IS USM: 2021-10-01 5.5 stage stabilizer: 100 400 67 164.7 79.5 635 45 32 0.88 0.41 Canon RF 100mm F2.8L ...

  6. Flange focal distance - Wikipedia

    en.wikipedia.org/wiki/Flange_focal_distance

    Diagram illustrating the flange focal length of an SLR–type and a mirrorless–type camera. For an interchangeable lens camera, the flange focal distance (FFD) (also known as the flange-to-film distance, flange focal depth, flange back distance (FBD), flange focal length (FFL), back focus [1] or register, depending on the usage and source) of a lens mount system is the distance from the ...

  7. Canon EF-S lens mount - Wikipedia

    en.wikipedia.org/wiki/Canon_EF-S_lens_mount

    The EF-S lens mount is a relatively new offering from Canon, so the selection of available lenses is limited compared to the full EF range, but it is backward compatible with the EF mount, and can therefore still accept all EF lenses. The variety of EF-S prime lenses is very limited in comparison to EF-S zoom lenses, with three primes to nine ...

  8. Canon Extender EF - Wikipedia

    en.wikipedia.org/wiki/Canon_Extender_EF

    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 either 1.4x or 2x, at the cost of decreasing the lens' aperture by 1 ...

  9. Canon EF 100mm lens - Wikipedia

    en.wikipedia.org/wiki/Canon_EF_100mm_lens

    The EF 100 mm f / 2.0 USM lens is a compact medium telephoto lens with a large aperture. Its physical and optical characteristics are similar to the Canon EF 85 mm f / 1.8 lens. Since this lens is not a macro lens, it is lighter and smaller than the macro lenses. It is also a stop faster. Therefore, it can act as an excellent general-purpose lens.

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