Nikon D1 Manual page 51

2 b In continuous servo AF, after confirming that the in-
focus indicator ( ) appears in the viewfinder, press
the button. Both exposure and focus will be
locked as long as the
if you remove your finger from the shutter-release
button.
3
Keeping focus locked, recompose your photograph (A) and press the
shutter-release button the rest of the way down to shoot (B).
A
Do not change the distance between the camera and the subject while
focus lock is in effect. If your subject moves, release focus lock and focus
again at the new distance.
Tip
If you keep the shutter-release button pressed half way down after taking a photograph,
focus lock will remain in effect, allowing you to take a succession of photographs at the
same focus setting. If you keep the
photographs at the same focus and auto exposure settings.
38
button is held down, even
B
button pressed, you can take a succession of
Camera Settings: Focus Lock