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2. Canon EF-M lens mount - Wikipedia

   en.wikipedia.org/wiki/Canon_EF-M_lens_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 features the same crop factor (of roughly 1.6) as the existing EF-S lens mount.

3. 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.

4. 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 ...

5. Canon EF-M 32mm lens - Wikipedia

   en.wikipedia.org/wiki/Canon_EF-M_32mm_lens

   The EF-M 32mm f/1.4 STM is an interchangeable prime lens introduced by Canon in September 2018. The lens is based on the EF-M mount that is used in Canon's lineup of mirrorless cameras. It currently is the latest lens published that uses the EF-M lens mount. With a maximum value of f/1.4, it has the largest aperture of all Canon EF-M mount lenses.

6. 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.

7. Category:Canon EF-M-mount lenses - Wikipedia

   en.wikipedia.org/wiki/Category:Canon_EF-M-mount...

   Pages in category "Canon EF-M-mount lenses" The following 9 pages are in this category, out of 9 total. ... Canon EF-M 55-200mm lens This page was last ...