Sony released the new firmware updates for FE 70-200mm f/2.8 GM OSS lens and FE 100-400mm f/4.5-5.6 GM OSS lensto improve AF-C (continuous AF) performance for zooming when attached to the Sony a9 camera.
Sony FE 70-200mm f/2.8 GM Firmware Ver.03 at Sony USA and Sony Australia.
Sony FE 100-400mm f/4.5-5.6 GM Firmware Ver.02 at Sony USA and Sony Australia.
This update (version 03) improves AF-C (continuous AF) performance for zooming when attached to an ILCE-9 camera (requires the latest ILCE-9 system software update).
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