Nikon D5100 Guide D’Exploitation

69

t

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.

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.

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.

While exposure lock is in effect, an AE-L indicator will 
appear in the viewfinder.

Keeping the AE-L/AF-L button pressed, recompose 
the photograph and shoot.

A

If On is selected for Custom Setting c1 (Shutter-release 
button AE-L; 

0 159), exposure will lock when the shutter-

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).

A

While exposure lock is in effect, the following settings can be adjusted without altering the 
metered value for exposure:

Programmed auto

Shutter speed and aperture (flexible program; 

0 62)

Shutter-priority auto

Shutter speed

Aperture-priority auto

Aperture

The metering method itself can not be changed while exposure lock is in effect.