Autoexposure Lock - Nikon D5100 Reference Manual

Autoexposure Lock

Use autoexposure lock to recompose photographs after using M (Center-weighted
metering) and N (Spot metering) to meter exposure; note that autoexposure lock is
not available in i or j mode.
1
Meter exposure.
Position the subject in the center of the frame
(center-weighted metering) or the selected
focus point (spot metering) and press the
shutter-release button halfway to set focus and
meter exposure. Check that the in-focus
indicator (I) appears in the viewfinder.
2
Lock exposure.
With the shutter-release button pressed halfway and the
subject positioned in the focus point, press the AE-L/AF-L
button to lock exposure.
A
Autoexposure Lock
If On is selected for Custom Setting c1 (Shutter-release is selected for Custom Setting c1 is selected for Custom Setting c1 (
button AE-L; 0 159), exposure will lock when the shutter-
release button is pressed halfway. release button is pressed halfway. release button is pressed halfway. For information on
changing the role of the AE-L/AF-L button, see Custom Setting f2
(Assign AE-L/AF-L button; 0 166).
While exposure lock is in effect, an AE-L indicator will
appear in the viewfinder. appear in the viewfinder. appear in the viewfinder.
3
Recompose the photograph. Recompose the photograph. Recompose the photograph. Recompose the photograph. Recompose the photograph.
Keeping the Keeping the Keeping the AE-L/AF-L button pressed, recompose AE-L/AF-L AE-L/AF-L
the photograph and shoot. the photograph and shoot. the photograph and shoot.
A
Adjusting Shutter Speed and Aperture
While exposure lock is in effect, the following settings can be adjusted without altering the
metered value for exposure:
Mode
Programmed auto
Shutter-priority auto
Aperture-priority auto
The metering method itself can not be changed while exposure lock is in effect.
tton pressed halfway and the tton pressed halfway and the
e focus point, press the e focus point, press the
159), exposure will 159), exposure will lo lock when the shutter- ck when the shutter-
For information on For information on
button, see Custom Setting f2 button, see Custom Setting f2
AE-L/AF-L AE-L/AF-L
0 0
166). 166).
is in effect, an is in effect, an
Shutter speed and aperture (flexible program; 0 62)
AE-L/AF-L AE-L/AF-L
(Shutter-release Shutter-release
Setting
Shutter speed
Aperture
Shutter-release
button
t
AE-L/AF-L button
69