Sony FE 100-400mm F4.5–5.6 GM OSS Firmware Update v02 (Download Here) Improves continuous autofocus (AF-C) performance while zooming in when attached to ILCE-9 *1 *1: Latest system software update required. Sony F2.8 70-200mm Zoom GM Firmware Update v03 (Download Here) Improves continuous autofocus (AF-C) performance while zooming in when attached to ILCE-9 *1 *1: Latest … Continue reading Sony F2.8 70-200mm Zoom GM and FE 100-400mm F4.5–5.6 GM OSS Firmware Update