The Metabones Canon EF Lens to Sony NEX Camera Lens Mount Adapter Mark IV allows you to attach a Canon EF lens to a Sony NEX camera. It retains electronic communication between the camera and lens and therefore provides automatic aperture control, EXIF data, image stabilization and autofocus. The Mark IV provides the same functions as the Mark III but provides optimized performance and an improved internal structure.
The Metabones Mark IV works perfectly on Sony fully frame cameras such as the Sony A7S.
The Smart Adapter IV offers two operation modes: Green and Advanced modes. Green mode is the default and it is designed to conserve battery power by limiting aperture diaphragm movements and image stabilization. Certain other functions are not available in Green Mode including Auto-Magnify MF Assist and DOF preview.
This adapter is also compatible with manual lenses which have no electrical contacts.