Samsung EV-NX30ZZBGBUS - Manual (Page 89)

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Shooting Functions >
AF area
Multi AF
The camera displays a green rectangle in places where focus is set
correctly. The photo is divided into two or more areas, and the camera
obtains focus points of each area. It is recommended for scenery photos.
When you press [Shutter] halfway, the camera displays the focus areas as
shown in the photo below.
Face Detection AF
The camera focuses on human faces preferentially. Faces of up to
10 people can be detected. This setting is recommended for shooting a
group of people.
When you press [Shutter] halfway, the camera focuses on faces as shown
in the photo below. In cases of shooting a group of people, the camera
displays the focus on the nearest person’s face in white and the rest of the
people’s faces in gray.