Nikon D300 User Manual page 305

This function allows you to meter from one area of the scene
and then recompose to another area without losing the meter
reading from the first area—as long as you hold the
Shutter-release button
Looking at this from another direction, when you have
Shutter-release button AE-L
lock when you have the
normal way.
Here are the screens and steps used to configure
Shutter-release button AE-L
Figure 4-26. Shutter-release button AE-L
1. Select c Timers/AE lock
and scroll to the right (see
2. Highlight
right (see
3. Choose one of the two choices on the menu. In
Figure 4-26, image 3,
4. Press the
My Recommendation: I only use this feature when I really
need it, then turn it off. The rest of the time, I just use the
AE-L/AF-L button
halfway down.
AE-L/AF-L button
(see
Shutter-release button AE-L
Figure 4-26, image 2).
On
OK button to lock in the setting.
to lock my exposure. I don't think I'd
set to Off, exposure will only
Figure 4-26):
from the Custom Setting Menu
Figure 4-26, image 1).
has been selected.
305
held down—the
and scroll to the