Getting Good Results With Autofocus - Nikon D2Xs Manual

Getting Good Results with Autofocus

Autofocus does not perform well under the conditions listed below. If the
camera is unable to focus using autofocus, use manual focus ( ) or use
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focus lock ( ) to focus on another subject at the same distance and then
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recompose the photograph.
AF-Assist Illuminators
If the subject is dark, an optional Speedlight with an AF-assist illuminator can be used
to assist the autofocus.
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