Please note this item is not compatible with the new Sony a7 iii camera.
The Metabones Canon EF lens to Sony NEX Smart Adapter IV allows you to use EF or EF-S lenses on a Sony NEX mount camera. It is compatible with full frame NEX cameras such as the a7s and a7r. This Smart Adapter has the following features:
* True electronic integration of aperture diaphragm - let camera automatically choose aperture in P or S exposure modes, or dial in yourself on the camera body in A or M modes.
* Powered by camera body. No external power source required.
* Wide open button (opposite of depth-of-field preview function) makes manual focusing easy.
* The tripod foot is detachable and compatible with Arca Swiss, Markins, Photo cam ball heads.
For a complete compatibility list click here
Note: Vignetting at corners may occur for certain EF-S lenses because they are designed to cover a 1.6x crop image circle but Sony NEX has a 1.5x crop sensor.