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A Metered Area
In spot metering, exposure will be locked at the value metered in a 4-mm (0.16 in.) circle
centered on the selected focus point. In center-weighted metering, exposure will be locked
at the value metered in a 12-mm circle in the center of the viewfinder.
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 Setting
P Shutter speed and aperture (flexible program; 0 75)
S Shutter speed
A Aperture
The new values can be confirmed in the viewfinder and control panel.
Note that metering
can not be changed while exposure lock is in effect.
A See Also
If On is selected for Custom Setting c1 (Shutter-release button AE-L, 0 226), exposure will
lock when the shutter-release button is pressed halfway.
For information on changing the
role of the A AE-L/AF-L button, see Custom Setting f4 (Assign AE-L/AF-L button, 0 244).