The Vello Auto Lens Adapter for Canon EF/EF-S Lenses to Canon EOS M Camera enables you to use your Canon EF and EF-S lenses with the Canon EOS M mirrorless digital camera system, which uses an EF-M lens mount. It is fully compatible with all lens functions, including image stabilization, electronic aperture control, and autofocus. A tripod adapter is provided for reducing strain on the camera when using heavier lenses. This mount can be removed for using longer telephoto lenses that feature their own tripod collar. And, included with the adapter are front and rear caps for storage.