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  2. Samyang Optics - Wikipedia

    en.wikipedia.org/wiki/Samyang_Optics

    Samyang Optics is a South Korean manufacturer of camera lenses for several major brands of third-party mounts for still photography and video cameras. The company was founded in 1972 and has about 150 employees. Samyang exports to 58 countries through 39 overseas agents and distributors. In July 2023, Samyang joined the L-Mount Alliance. [1]

  3. Canon EF lens mount - Wikipedia

    en.wikipedia.org/wiki/Canon_EF_lens_mount

    Compatible third-party lenses with the EF lens mount are manufactured by Yongnuo, Samyang, Schneider, Sigma, Tamron, Tokina, Cosina and Carl Zeiss. The manufacturers of these lenses have reverse engineered the EOS electronics—except Zeiss, which does not have the rights to use the autofocus or the electronic aperture control of EOS cameras ...

  4. Lenses for SLR and DSLR cameras - Wikipedia

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

    Some of the newest A-mount lenses are designated "DT" for Digital Technology; these are for digital cameras with APS-C sensors, and will result in vignetting if used on a film SLR or a full frame DSLR or full frame SLT camera. Third-party lenses for the AF lens mount are made by Zeiss, Sigma, Tamron, Tokina and Vivitar.

  5. Canon EF 500mm lens - Wikipedia

    en.wikipedia.org/wiki/Canon_EF_500mm_lens

    The EF 500mm f / 4L IS USM with a Canon 2x Extender, rigged with flash and monopod. A typical setup for when taking photographs of birds. The EF 500mm f / 4L IS USM is a professional L series lens that was designed to replace the EF 500mm f / 4.5L USM. This lens is constructed with a metal body and mount, and with plastic extremities and switches.

  6. Samyang 500mm f/8 - Wikipedia

    en.wikipedia.org/wiki/Samyang_500mm_f/8

    The Samyang 500mm F8.0 MC Mirror is a supertelephoto lens and is designed for full frame DSLRs. [1] It is a mirror lens. The lens is made in South Korea by Samyang Optics and marketed under several brand names, including Rokinon and Walimex. The lens uses manual focus only. As all mirror lenses, it cannot change the aperture.

  7. 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.

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