Nikon 25446B D90 User's Manual - Page 109

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 Setting Shutter speed and aperture (flexible program; pg. 80) Shutter speed Aperture The new values can be confirmed in the viewfinder and control panel. Note that the metering method can not be changed while exposure lock is in effect (changes to metering take effect when the lock is released). A See Also If On is selected for Custom Setting c1 (Shutter-release button AE-L, pg. 179), exposure will t 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 f4 (Assign AE-L/AF-L button, pg. 200). 89