The Zacuto GH5 cage is equipped to support a Metabones adapter with the addition of the Z-GMB adapter piece. Screw this piece into the two front screw holes underneath the lens and you are ready to support your Micro 3/4's to EF Metabones adapters. No rods required! This adapter works on these two speed boosters: the Speed Booster 0.64x, and the Speed Booster 0.71x.