Razberi DV200 User Manual page 27

Auto Focus (AF) Adjustment
The AF mode can be defined as of automatic, zoom triggered and one-push.
Auto (Continuous AF)

In this mode, the camera will keep in focus automatically and
continuously regardless of zoom changes or any view changes.
Zoom AF (Zoom Trigger AF)

In this mode, AF is activated at the time when zoom is adjusted.
Push AF

The one-push AF function is for fixing the focus on the target in a shot
using AF. Once click on the button, AF will be implemented.
Reset button

Click on the <Reset> button, and the camera lens will be calibrated at
full wide end and infinity focus at once.
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