The Canon Mount Adapter EF-EOS M is a lens adapter designed for mirrorless camera users featuring full compatibility with Canon EF and EF-S lenses. Seamless EF/EF-S lens support for expanding your lens options without sacrificing performance Maintains autofocus and image stabilization functions for effortless shooting and sharp results Compact, lightweight design for easy transport and minimal bulk in your camera bag Durable metal mount construction for long-lasting reliability and secure lens attachment Precise electronic communication ensures accurate aperture control from your camera body Compatible with a wide range of Canon EF and EF-S lenses for maximum creative flexibility No optical elements for uncompromised image quality and zero added distortion Tripod mount included for improved balance when using heavy lenses on smaller EOS M bodies Simple, tool-free installation for quick and hassle-free lens changes in the field Firmware updatable via camera for ongoing compatibility with new Canon lenses and bodies