Use the [AUTOFOCUS SETTING] > [AF MODE] option in the shooting menu to choose the AF mode for focus modes [S] and [C].
The camera focuses on the subject in the selected focus point. Use for pin-point focus on a selected subject.
The camera focuses on the subject in the selected focus zone. Focus zones include multiple focus points (5 × 3, 5 × 5, or 3 × 3), making it easier to focus on subjects that are in motion.
In focus mode [C], the camera tracks focus on the subject in the selected focus point while the shutter button is pressed halfway. In focus mode [S], the camera automatically focuses on high-contrast subjects; the areas in focus are shown in the display.
The camera may be unable to focus on small objects or subjects that are moving rapidly.