Metabones Speed Booster XL 0.64x for Panasonic GH4!

Speed Booster XL 0.64x from Caldwell Photographic Inc. and Metabones is a new Micro-4/3 mount Speed Booster adapter designed exclusively for the Panasonic GH4 and other selected Micro Four Thirds cameras, with a magnification of 0.64x. The Speed Booster XL 0.64x uses an advanced 6-element optical design to achieve extraordinary optical performance at apertures up to an incredible f/0.80, a new record for Micro Four Thirds format. The adapter is compatible with Blackmagic Cinema Camera MFT, Blackmagic Pocket Cinema Camera, Panasonic DMC-GH4, and some older models of MFT cameras, including Panasonic GH3 and Olympus E-PL7.