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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 interch...

M42 LENS MOUNT ADAPTERS  The Pentax/Praktica style Universal (M42x1) thread mount lenses were very popular for many years.  Now of course they are ...

These adapters do not allow for autofocus, however automatic exposure is possible in the aperature priority mode. The EF lens mount is the standar...