Would EF - MFT mount Speed Booster XL 0.64x work on old BMC 2.5K camera ? Metabones says The Speed Booster XL 0.64x is similar to the Blackmagic-specific 0.64x BMCC Speed Booster (MB_SPEF-BMCC-BM1), but has been completely re-designed to meet the following requirements) also I can see in the chard circles that’s it will work what do you guys think I am thinking of using this new speed booster with adapter for my yashica lenses