Sony Cyber-shot DSC-RX100 IV - Manual (Page 48)

Focusing may be difficult in the following situations:
It is dark and the subject is distant.
The contrast of the subject is poor.
The subject is seen through glass.
The subject is moving quickly.
There is reflective light or shiny surfaces.
There is a flashing light.
The subject is backlit.
[24] How to Use Shooting Shooting still images/movies
Shooting movies
You can record movies by pressing the MOVIE (Movie) button.
1. Press the MOVIE button to start recording.
2. Press the MOVIE button again to stop recording.
Hint
You can assign the start/stop movie recording function to a preferred key. MENU
→
(Custom Settings)
→ [Custom Key Settings] → set the function to the preferred key.
When you want to specify the area to be focused on, set the area using [Focus Area].
To keep the focus on a face, arrange the composition so that the focus area frame and
face detection frame overlap, or set the [Focus Area] to [Wide].
Note
To adjust the shutter speed and aperture value to the desired settings, set the shooting
mode to (Movie).