Getting Good Results With Autofocus - Nikon D2Hs User 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 81) or use
focus lock ( 78) to focus on another subject at the same distance and then
recompose the photograph.
AF-Assist Illuminators
If the subject is dark, a Speedlight with an AF-assist illuminator can be used to assist
the autofocus.
80