It allows you to use your EOS M to attach any of Canon’s extensive range of EOS System lenses - connecting you to a world of creative possibilities. The extensive range includes fixed focus and zoom lenses covering a focal length range From 8mm to 800mm. It permits all lens functions including image stabilization and autofocus, and features a removable tripod mount. Expand your EOS M system and explore your creativity! The mount Adapter fees m gives you complete access to the full spectrum of Canon EF and EF-S lenses so you can use your existing lenses and try out new ones to get the shots you want. This adapter supports auto focus function and aperture adjustment. Quick focusing, smooth adjusting of aperture, shutter, ISO data etc. Small and lightweight, to match the EOS M, the Mount Adapter EF-EOS M is easy to carry with you, wherever you go.