Nikon D3s Technical Manual page 17

AF-C priority AF-C priority
selection selection
Release
Dynamic Dynamic
AF area AF area
9 points or 21 points
21 points
9 points or 21 points
9 points or 21 points
9 points
Focus tracking Focus tracking
with lock-on with lock-on
3 (Normal)
5 (Long)
3 (Normal)
13