Features: Lens-side mount: Canon EF-Mount (positive-lock EF mount) Camera-side mount: MFT Mount Electronic aperture control Power supply via camera or micro USB through an optional external 5V power source Increases the maximum aperture by 1 1/3 stops Focal length multiplier: 0.64x Transmission of EXIF data Supports image stabilization on some lenses and cameras (see the Metabones website for details) The entrance pupil of the lens does not change with the adapter Improves the lens’s light-gathering ability by shortening the focal length Removable foot with 1/4"" thread, Arca-Swiss compatible The adapter is very compatible with my other equipment. For example, it works well with the BMPCC 4K. There are also many other lenses that might be of interest. You can put together exactly what you need for your shoot. Check out my other listings. If you rent multiple items, I can offer you a discount :)