Metabones have issued a firmware upgrade for four of their Canon EF to Micro Four Thirds adapters. Applicable to the Canon EF to Micro Four Thirds Speed Booster  S Adapter  (model number MB_SPEF-M43-BM2, pictured), the Canon EF to Micro Four Thirds Speed Booster Adapter (model number MB_SPEF-M43-BM1), the Canon EF to Micro Four Thirds T Speed Booster  ULTRA 0.71x Adapter  (model number MB_SPEF-M43-BT4) and the Canon EF to Micro Four Thirds T Speed Booster  XL 0.64x Adapter  (model number MB_SPEF-M43-BT3), Firmware Version 1.7 enables auto focus on Panasonic Micro Four Thirds camera bodies and fixes a couple of bugs.

Metabones Canon EF to MFT Speed Booster Adapter Firmware V1.7 for Mac OS
Metabones Canon EF to MFT Speed Booster Adapter Firmware V1.7 for Microsoft Windows

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