Canon EF-EOS M mount adapter, durable with a metal mount. - Brand: Canon - Model: Mount Adapter EF-EOS M - Included items: Instruction manual, box, lens cap - Features: Metal mount, with electronic contacts Thank you for viewing. This is an adapter that converts Canon EF-M mount to EF mount. Since there are few EF-M lenses, you can use the legendary EF lenses by converting.