Nikon Autofocus: AFS / AFC

AF-S: Single Focus

• when you press the shutter button half way down as long as your finger stays down on the button your focus will not change.
• It is good to use the Single point AF
• Good for group picture (since the focus is lock and I don't want to re-focus again if people are moving around)

AF-C: Continuous

• as long as your finger is pressed half way down it is gong to continue to focus on what ever subject is in the focusing square.
• It is good to use the Dynamic Area AF (3D is no good, the focus keeps switching when tracking the subject)