Metabones Canon EF Lens to Micro Four Thirds Speed Booster

Canon EF to Micro-4/3 mount Speed Booster adapter makes lens 0.71x wider, increase maximum aperture by 1 stop, and increases MTF. The adapter features built-in electronics to control lens aperture by the controls on the camera body, and is also powered by the camera's body. The adapter is an ideal companion for Blackmagic Cinema Camera MFT or the mirrorless Panasonic GH4 models.

Advanced Optical Design
The Speed Booster uses an advanced optical design incorporating ultra-high index glass to achieve extraordinary optical performance at record-breaking apertures. In addition to increasing lens speed and field of view, the Speed Booster increases the lenses MTF (Modulation Transfer Function). There is a dramatic performance enhancement near the center of the image, but there is also a moderate performance improvement in the outer parts of the image as well.

Compatible with Canon EF lenses
The adapter supports Canon EF lenses, incl. image stabilization (IS) lenses and electronic manual focusing (e.g. EF 85/1.2L II and the discontinued EF 50/1.0L) or EF lenses made by Sigma, Tamron and Tokina. The adapter is powered by a camera body; when used with passive MFT camcorders, the adapter can also be powered by external third-party 5 Volt MicroUSB power supply.

Key Features
– 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.
– Also accepts 3rd party external power supply via MicroUSB socket.
– 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 heads.

List of lenses tested with EF-M43 adapter
– Canon 20-35mm3.5-4.5
– Canon 28-80mm2.8-4L
– Canon 70-200mm2.8L
– Canon 24-70mm2.8_II
– Canon 24-105mm4_L
– Canon 70-200mm4_L
– Canon 70-300mm4-5.6L
– Canon 70-300mm4-5.6
– Canon 50mm1.8
– Canon 50mm1.4
– Canon 85mm 1.2
– Canon 100mm 2.8
– Sigma 18-200mm3.5-6.3
– Zeiss 35mm2