What autofocus mode does the camera employ?
Single-shot AF mode (AF-S): Focusing starts by pressing the shutter-release button partway down and fixes the focus when it is confirmed. This mode is mainly useful for a still subject. Continuous AF mode (AF-C): Camera continues to focus on a moving subject even while the shutter-release button is pressed partway down. It is convenient to capture the moving subject. Automatic AF (AF-A): Camera automatically detects the motion of the subject and selects appropriate AF mode; AF continuous for moving subject and AF single for still subject.