Sony HVL-F43M Operating Instructions Manual page 24

Auto WB Adjustment with Color
Temperature Info
White balance is automatically adjusted by your camera (except the DSLR-A100)
based on color temperature information when the flash unit fires.
• Auto WB Adjustment functions when you attach the flash unit to your camera
and use TTL flash mode on the flash unit.
• This function does not work during manual flash photography. (page 41)
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