Metabones MB_SPEF-M43-BM2 camera lens adapter

Canon EF Lens to Micro Four Thirds Speed Booster S, 0.71x This Canon EF Lens to Micro Four Thirds Speed Booster S Version (MB_SPEF-m43-BM2) must use with active MFT mount carmeas, such as OMD, GH4 and BMPCC, but is not compatible with passive MFT mount cameras, e.g. BMCC 2.5K.

<b>Features:</b>

- 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.
- The tripod foot is detachable and compatible with Arca Swiss, Markins and Photo Clam ball heads.
- Support O-M10, O-M1 and O-M5

Optics designed by Caldwell Photographic in the USA (patent pending)