Sony released quite a few lens updates to improve AF and allow for 20fps functionality on the Sony a9, which is now shipping. Lenses Sony 70-200mm GM firmware Sony 70-200mm G firmware Sony 28-70mm G firmware Sony 24-240mm G firmware Sony 24-70mm GM firmware Sony 24-70mm Zeiss firmware Sony 16-35mm Zeiss firmware Sony 85mm GM … Continue reading Sony Lens and Accessory Firmware Updates