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Canon RF lens 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.

Sensor formatSensor crop factor
Full frame1.00