Nikon S2J00200401 Getting Good Results with Autofocus, Subject is poorly lit, Ground, Camera

Getting Good Results with Autofocus

Autofocus does not perform well under the conditions listed below. In these cases
you can focus manually (	pg. 81) or use autofocus as detailed below.
ADVANCED	The subject is poorly lit
	Use a Speedlight with an AF-assist illuminator, such as the
	SB-28DX or SB-50DX (available separately) and select the
	center focus area.
PHOTOGRAPHY	There is little or no contrast between the subject and the back-
	ground
	Lack of contrast—for example, a subject that is the same
	color as the background—can interfere with autofocus. Use
—	focus lock (		pg. 78) to focus on another subject at the
GETTING
	same distance and then recompose your photograph.
	The focus area contains objects at different distances from
	the camera
GOOD
	For example, autofocus may not perform well when the
	subject is inside a cage. Use focus lock (			pg. 78) to focus
	on another subject at the same distance and then recom-
RESULTS
	pose your photograph.
	The subject is dominated by regular geometrical patterns
	Regular geometrical patterns—for example, a row of win-
WITH
	dows in a skyscraper—can interfere with autofocus. Use
	manual focus (		pg. 81).
AUTOFOCUS
	The focus area contains regions of sharply differing brightness
	The camera may not be able to focus using autofocus when,
	for example, the subject is half in the shade. Use manual
	focus (	pg. 81).
80