Metabones Speed Booster - Canon EF - BMPCC
The Canon EF to BMPCC Speed Booster adapter was designed exclusively for the Blackmagic Pocket Cinema Camera (BMPCC). PLEASE NOTE that this new 0.58x Speed Booster will only attach to BMPCC equipped with a Micro-4/3 mount. It cannot be attached to standard Micro 4/3 cameras (cannot be attached to GH4, GH3, GH2 and GH1 body).
This Speed Booster reduces the crop factor of the BMPCC from 3.02x to 1.75x and produces the largest aperture optics currently available, with a maximum output aperture of f/0.74.