Samsung EV-NXF1ZZB1QUS - Manual (Page 153)

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Camera settings menu >
User settings
Lens Button Speed Settings
Set the zoom speed for the Power Zoom lens' buttons at either fast,
medium, or slow speed. At fast speed, zoom noise increases and can be
recorded in videos. This function is available only when you attach the
Power Zoom lens using the mount adapter.
AF Lamp
When shooting in dark places, turn the AF lamp on in order to have a
better auto focus. The Auto Focus functions more accurately in dark places
when the AF lamp is on.
Auto Self-Shot
Set to turn on the camera and enter Self shot mode automatically when
you flip the display upward. In Self shot mode, the timer (3 seconds),
one-touch shot, face detection, and beauty face options are automatically
activated.