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  2. Canon EF lens mount - Wikipedia

    en.wikipedia.org/wiki/Canon_EF_lens_mount

    Number of Canon EF lenses sold over time (red), compared with Nikon F mount lenses (blue) The EF mount replaces its predecessor, the FD mount.The standard autofocus lens mounting technology of the time used a motor in the camera body to drive the mechanics of the focus helicoid in the lens by using a transfer lever.

  3. Canon EF-M lens mount - Wikipedia

    en.wikipedia.org/wiki/Canon_EF-M_lens_mount

    The EF-M lens mount is one of Canon's two new systems for mirrorless cameras, the other being the RF mount. The M system has an 18 mm flange focal distance (compared to 20 mm for RF and 44 mm for EF and EF-S) and a 47 mm throat diameter (compared to 54 mm for EF, EF-S, and RF). As it is designed for use with an APS-C-sized image sensor, it ...

  4. Canon FD lens mount - Wikipedia

    en.wikipedia.org/wiki/Canon_FD_lens_mount

    Canon New FD lens mounting surface.. The FD lens mount is a breech-lock mount, which is a variation of the common triple-flanged bayonet attachment. The advantage of the breech-lock over the bayonet is that neither the contact surfaces between the body and lens, nor the signalling mechanisms, rotate against each other when the lens is mounted.

  5. 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.

  6. Canon EOS R - Wikipedia

    en.wikipedia.org/wiki/Canon_EOS_R

    Canon RF 28-70mm F2 L USM; A Canon EF lens mounted to the EOS R via a Mount Adapter EF-EOS R. It is also possible to use older EF and EF-S lenses with one of the three available EF-EOS R mount adapters. [6] Mount Adapter EF-EOS R is the simplest adapter, connecting EF and EF-S lenses to the EOS R body.

  7. Lens mount - Wikipedia

    en.wikipedia.org/wiki/Lens_mount

    A lens mount is an interface ... due to beam splitter behind mount flange (accepts C-mount lenses with adapter) 1/3" bayonet mount ... lens, and Canon has "conversion ...

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