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Canon RF mount

The RF mount was introduced by Canon in 2018 for the new mirrorless full frame line of cameras, the EOS R family. With respect to previous full-frame mount, the EF, the inner diameter is the same but the distance to the sensor (flange distance) is much shorter to exploit mirrorless cameras design.

RF mount cameras can accept Canon EF mount lenses through an adapter.

54.0 mm
20.0 mm
NameSensor formatSensor cropAF supportYear
Full frame
Full frame1.00motor in lens2018
APS-C1.61motor in lens2022