Nikon D100 - Manual (Page 83)

Taking Photographs—Focus
Controlling How the Camera Focuses
71
3 Recompose the photograph and shoot.
In single-servo AF, focus will remain locked between shots as long as you keep
the shutter-release button pressed halfway, allowing you to take several pho-
tographs in succession at the same focus setting. Focus will also remain locked
between shots as long as the AE-L/AF-L button is pressed.
Do not change the distance between the camera and the subject while focus
lock is in effect. If your subject moves, focus again at the new distance.
14—AE-L/AF-L ( 154)
The AE-L/AF-L button can be set to lock only focus.
For more information on:
84 Autoexposure lock