Sony released firmware 4.0 for the Sony 70-200 GM and it can be downloaded here. Features This update (version 04) resolves an issue where some products may not operate properly after updating to version 03.   Related posts: TCSTV’s Best and Worst Camera Gear of 2016 Sony Lens and Accessory Firmware Updates Sony E PZ … Continue reading Sony FE 70-200mm f/2.8 GM OSS (SEL70200GM) Firmware 4.0