New 3.0 firmware update for the Sony A9

Sony issued a new firmware update for the Sony A9: https://esupport.sony.com/

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Added functions for professionals engaged in sports/news media:

Adds the Write Serial Number option (On/Off) to the menu for selecting your preference in writing the serial number to the Exif data

Improvements in auto focus performance and functionality:

Improves tracking performance of moving subjects in AF-C mode
Improves auto focus speed in low light
Adds AF Track Sens as a selectable option for custom key settings
Adds support for all focus areas when using LA-EA3 mount adaptor
(Focus Area options added: Zone, Expand Flexible Spot, and Lock-on AF)

Improvements in flash control performance and functionality:

Reduced release time lag when shooting with flash
Adds support for Slow Sync and Rear Sync when using flash wirelessly
Adds support for white balance automatic correction when using color filter of external flash (HVL-F60RM)

Other Improvements:

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Thanks Bard!