This is a mechanical adaptor with no electronics. The aperture on Canon EF lenses must be set beforehand.

This adaptor allows you to use your existing Canon EF lenses on cameras with a Micro Four Thirds mount, such as the Blackmagic Pocket Cinema Camera and the new Panasonic GH4.

Features:
Brass/nickel plated Canon EF mount.
Flat black coated internal baffle.
Provision to accept the MTF Support bridge MTF M/43 & E Mount Support.
Impossible to damage lens during fitting and operation.

Other Camera Fits:
Blackmagic Cinema Camera mFT, Blackmagic Pocket Cinema Camera, Micro Four Thirds, Olympus E-P1, Panasonic AG-AF101, Panasonic Lumix GH1

Other Lens Fits:
Canon EF