Nikon D90 Autoexposure Lock P, S, and a Modes Only, Select center-weighted or spot metering

Autoexposure Lock (P, S, and A Modes Only)

Use auto exposure lock to recompose photographs after metering exposure:

1Select center-weighted or spot metering.

Select mode P, S, or A and choose center-weighted or spot metering (exposure lock has no effect in mode M, while auto and scene modes are not recommended as center- weighted and spot metering are not

t available).

Zbutton

Main command dial

2 Lock exposure.	Shutter-release
Position the subject in the selected focus point and press	button
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-Lbutton to
lock focus and exposure.
	AE-L/AF-L button

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

3Recompose the photograph.

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

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