Sony issued a new firmware update for the Sony A9 with the following benefits:
- Support of “SEL400F28GM”
Adds a [Silent priority] option to the [Aperture Drive in AF] setting in the menu.
*Using the lens “SEL400F28GM”, when [Silent priority] is selected, the sound emitted by the aperture drive will be reduced. This is useful in shooting conditions where camera noise should be kept to a minimum. Note that Auto Focus may become slower when [Silent priority] is selected. - Other improvements
Improves the overall stability of the camera