Canon EF Lens to Sony E-Mount T Smart Adapter (Mark IV). The new MARK IV (MB_EF-E-BT4) improves on the old MARK IV (MB_EF-E-BM4) by lining the inner opening with a flocking material coating. This will further reduce internal reflection when a tilt-shift (TS) lens is used.
Phase-detect autofocus support on A7RII.
Supports 5-axis in-body image stabilization of A7II and A7RII
Powered by camera body. No external power source required.
Aperture control from camera body.
Wide open button (opposite of depth-of-field preview function) makes manual focusing easy and assignable to a custom function on A7 series.
High performance 32-bit processor and efficient switched-mode power supply.
Supports image stabilization (IS) lenses.
Supports electronic manual focusing (e.g. EF 85/1.2L II and discontinued EF 50/1.0L)
EXIF support (focal length, aperture, zoom range)
Distance and zoom display on VG and FS series camcorders (lens with distance information support required).
Auto magnify (lens with distance information support required)
Auto "APS-C Size Capture" on full-frame cameras with Canon EF-S lenses and many third party DX lenses.
Fits both EF and EF-S lenses. (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.)
Flocking material coated inside the opening to reduce internal reflection.
The tripod foot is detachable and compatible with Arca Swiss, Markins, Photo cam ball heads.
Disclaimer: Metabones is NOT licensed, approved or endorsed by Sony or Canon.