Sony DSC-RX100 How To Use Manual page 63

2. Align the target frame (A) over the subject and press the center of the control wheel.
Press the center again to stop tracking.
If the camera loses track of the subject, it can detect when the subject reappears on
the monitor and resume tracking.
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
The camera may not be able to resume tracking for a while after it loses the track of the
subject.
[55] 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.
Using shooting functions
(Camera Settings) → [Focus Mode] → [Single-shot AF].
Adjusting the focus