Canon EF-M lens mount

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Canon EF/EF-S adapter, 22mm prime lens and 18-55mm standard zoom lens

The Canon EF-M lens mount, introduced in 2012, is a derivative of the Canon EF lens mount designed for use with the Canon EOS M mirrorless interchangeable-lens camera. It has a 18mm flange focal distance (compared to 44mm for EF and EF-S lenses), though 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. It allows the use of Canon EF and EF-S lenses with a Canon-made adapter, but it is not backwards-compatible with Canon's existing DSLR cameras.[1]

List of EF-M lenses[edit]

Focal length Effective focal length
(×1.6 crop factor)
Aperture range Introduced Macro USM STM IS L-series DO
11–22mm 17.6–35.2 mm f/4–5.6 2013 No No Yes Yes No No
18–55mm 28.8–88 mm f/3.5–5.6 2012 No No Yes Yes No No
55-200mm 88-320 mm f/4.5-6.3 2014 No No Yes Yes No No
22mm 35.2 mm f/2 2012 No No Yes No No No


References[edit]