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Metabones Leica R to BMCC Speed Booster
Leica-R to Micro-4/3 mount Speed Booster adapters designed exclusively for the Blackmagic 2.5k Cinema Camera (BMCC). Note that the new Speed Boosters will only attach to Blackmagic cameras equipped with a Micro-4/3 mount. They cannot be attached to standard Micro 4/3 cameras.
The new 0.64x Speed Booster reduces the full-frame crop factor of the BMCC from 2.39x to 1.53x, thus effectively transforming it into a Super-35 format cine camera. In addition, the speed of any attached lens is increased by 11/3 stops, with a maximum output aperture of f/0.80. For example, a 50mm f/1.2 becomes a 32mm f/0.80, and Sigma’s new 18-35mm f/1.8 will become an 11.5-22.5mm f/1.1.
Metabones Speed Booster Features
Increase maximum aperture by 1 1/3 stop (with a maximum output aperture of f/0.80)
Makes lens 0.64x wider
Optics designed by Caldwell Photographic in the USA (patent pending)
The tripod foot is detachable and compatible with Arca Swiss, Markins, Photo cam ball heads
Table of compatibility and resulting crop factors