Nikon D7000 D7000 User's Manual - Page 126
Autoexposure Lock
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Autoexposure Lock Use autoexposure lock to recompose photographs after metering exposure: 1 Set metering to Z or b (0 105). Choose Z to assign the greatest weight to the center of frame, or b to set exposure for a 3.5-mm circle centered on the active focus point. a will not produce the desired results. 2 Lock exposure. Position the subject in the selected focus point and press the shutter-release button halfway. With the shutter-release button pressed halfway and the subject positioned in the focus point, press the AE-L/AF-L button to lock focus and exposure (if you are using autofocus, confirm that the I in-focus indicator appears in the viewfinder). While exposure lock is in effect, an AE-L indicator will appear in the viewfinder. Shutter-release button AE-L/AF-L button 3 Recompose the photograph. Keeping the AE-L/AF-L button pressed, recompose the photograph and shoot. Z 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 68) 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, 0 213), 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 f5 (Assign AE-L/AF-L button, 0 232). 106