This Metabones adapter allows you to use your Canon EF lenses on active micro 4/3 mount cameras such as the Panasonic GH4. This lens adapter is not compatible with passive M 4/3 lens mounts.
- Increase maximum aperture by 1 stop.
- Increase MTF.
- Makes lens 0.71x wider.
- Build-in electronics to control lens aperture.
- The lens aperture is set by the controls on the camera body.
- Powered by camera body. no external power source required.
- High performance 32-bit processor and efficient switched-mode power supply.