Sony DSC-RX100M4 How To Use Manual page 86

Help Guide
3. Press the shutter button fully down to shoot the image.
Note
[Center Lock-on AF] may not function very well in the following situations:
The subject is moving too quickly.
The subject is too small, or too large.
The contrast between the subject and the background is poor.
It is dark.
The ambient light changes.
Lock-on AF does not work in the following situations:
In [Sweep Panorama] mode
When [Scene Selection] is set to [Hand-held Twilight] or [Anti Motion Blur]
When shooting in Manual Focus mode
When using the digital zoom
When the shooting mode is set to Movie, and [
The camera may not be able to resume tracking for a while after it loses the track of the
subject.
[63] How to Use
Focus-lock
Shoots images with the focus locked on the desired subject in auto focus mode.
1. MENU →
2. Place the subject within the AF area and press the shutter button halfway down.
The focus is locked.
3. Keep pressing the shutter button halfway down, and place the subject back in the
original position to re-compose the shot.
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Using shooting functions
(Camera Settings) → [Focus Mode] → [Single-shot AF].
SteadyShot] is set to [Intelligent Active].
Adjusting the focus