Sony A7RIII ILCE-7RM3A Operating Instructions Manual page 169

The focus is locked.
If it is difficult to focus on the desired subject, set [Focus Area] to [Center] or [Flexible Spot].
3.
Keep pressing the shutter button halfway down, and place the subject back in the original position to re-compose the
shot.
4.
Press the shutter button down fully to take the picture.
Hint
When the product cannot focus automatically, the focus indicator flashes and the beep does not sound. Either recompose the
shot or change the focus setting. In [Continuous AF] mode,
achieved does not sound.
An icon indicating that data is being written is displayed after shooting. Do not remove the memory card while the icon is
displayed.
Note
When the subject is moving, you cannot lock the focus even if [Focus Mode] has been set to [Automatic AF].
Related Topic
List of mode dial function
Clear Image Zoom/Digital Zoom (Zoom)
Playing back still images
Auto Review
Focus Mode
Focus Area
lights up and the beep indicating that the focus has been
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