Metabones added official Sony a9 support today with Firmware version 0.57 for the EF-E Smart Adapter Mark IV/V and EF-E Speed Booster Ultra. Hopefully, we will see some new reviews soon. This Firmware is For Metabones EF-E Speed Booster ULTRA 0.71x B&H Photo / Amazon / Adorama Metabones Canon EF/EF-S Lens to Sony E Mount … Continue reading Metabones 0.57 Firmware Update Adds Official Sony a9 Support