Nikon D100 User Manual download pdf (Page 96)

Taking Photographs—Exposure

Exposure

Autoexposure Lock

When center-weighted metering is used, an area in the center of the frame is

assigned the greatest weight when determining exposure. Similarly, when

spot metering is used, exposure is based upon lighting conditions in the cur-

rently selected focus area. If your subject is not in the metered area when the

picture is taken, exposure will be based on lighting conditions in the back-

ground, and your main subject may be under- or over-exposed. To prevent

this, use autoexposure lock:

Select center-weighted or spot metering. If us-

ing center-weighted metering, select the cen-

ter focus area with the multi selector ( 64).

Position the subject in the selected focus area and press the shutter-release

button halfway. Keeping the shutter-release button pressed halfway and

your subject positioned in the focus area, press the AE-L/AF-L button to

lock exposure (and focus, except in manual focus mode). Confirm that the

in-focus indicator (●) appears in the viewfinder.

While exposure lock is in effect, an EL indicator will appear in the viewfinder.

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Nikon D100 User Manual Page 96