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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.
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]
The Panavision mounts are exclusively used with Panavision lenses, and thus are only available on Panaflex cameras or third-party cameras "Panavised" by a Panavision rental house, whereas the PL-mount style is favored with most other cameras and cine lens manufacturers. Both of these mounts are held in place with locating pins and friction ...
The Canon RF 100-500mm is a superb addition to the rapidly expanding range of RF-mount lenses. It combines Canon's legendary L-series build quality with premium optical performance that's up there ...
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.
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 ...
Third-party lenses and adapters often rely on reverse engineering the electronic protocol of a lens mount and might not work properly on new cameras or firmware versions. However, Cosina Voigtländer , [ 35 ] Sigma [ 36 ] and Tamron [ 37 ] licensed the mount from Nikon, enabling full compatibility.
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