The Metabones BMPCC4K Speed Booster Ultra 0.71x EF-Mount to MFT-Mount Lens Adapter mounts EF-Mount lenses on an MFT-Mount camera body. Its optical group compresses the image circle to 0.71x, which widens the field of view and adds one stop of light. Electronic contacts carry aperture control from the camera to the lens. Autofocus works in both single and continuous modes. Optical stabilization in the lens stays available through the adapter. The lens reports its metadata to the camera, so focal length and aperture are recorded with the shot. A tripod foot carries the weight of the lens instead of hanging it off the camera mount.
Key Features
EF-Mount Lenses on MFT-Mount
Mounts an EF-Mount lens on an MFT-Mount camera body, holding it at the flange distance the lens was designed for so it still focuses to infinity.
0.71x Optical Reduction
An optical group compresses the image circle to 0.71x, widening the field of view and adding one stop of light.
Electronic Aperture Control
Aperture is set from the camera body, which drives the lens diaphragm through the adapter's contacts.
Autofocus Support (AF-S and AF-C)
Autofocus works in both single and continuous modes, so the camera can keep focus on a moving subject through the adapter.
Image Stabilization Support
Optical stabilization in the lens stays available through the adapter.
Lens Metadata
The lens reports focal length, aperture and focus data to the camera, so it is recorded with the shot.
Tripod Foot
A tripod foot carries the weight of the lens instead of hanging it off the camera mount.
