Sony Alpha 7RV Help Manual page 93

Press the shutter button fully down.
6
To select the focus mode yourself (
Specifying a focus mode, such as selecting
(Continuous AF) for moving subjects, makes it easier to focus on the desired subject. You can also specify the focus
position and range using [
Shooting while focusing on human eyes
The [ Subject Recog in AF] function under [Subject Recognition] is enabled in the default settings, so you can use the
Eye AF function immediately.
To shoot images with the focus locked on the desired subject (Focus-lock)
When you focus on the subject, the focus is locked while the shutter button is pressed halfway down. Switch to the
desired composition and press the shutter button all the way down to take the picture.
You can lock the focus on non-moving subjects. Set [
Setting [ Focus Area] to [Center Fix] makes it easier to focus on subjects located in the center of the screen.
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 mode or focus area settings. In [Continuous AF] mode,
indicating that the focus has been achieved does not sound.
Note
An icon indicating that data is being written is displayed after shooting. Do not remove the memory card while the icon is
displayed. Doing so will prevent images from being recorded normally.
Related Topic
Selecting the focus method (Focus Mode)
Selecting the focus area (Focus Area)
Playing back still images
Auto Review (still image)
Focus Mode /
(Single-shot AF) for landscapes or still subjects and selecting
Focus Area].
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Focus Area)
Focus Mode] to
(focus indicator) lights up and the beep
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(Single-shot AF).