Nikon D3X Getting Good Results with Autofocus

Getting Good Results with Autofocus

Autofocus does not perform well under the conditions listed below. The shutter release may be disabled if the camera is unable to focus under these conditions, or the in-focus indicator (●) may be displayed, allowing the shutter to be released even when the subject is not in focus. In these cases, use manual focus (pg. 83) or use focus lock (pg. 80) to focus on another subject at the same distance and then recompose the photograph.

N	There is little or no contrast between the subject
	and the background
	Example: subject is the same color as the background.
	The focus point contains objects at different
	distances from the camera
	Example: subject is inside a cage.
	The subject is dominated by regular geometric
	patterns
	Example: blinds or a row of windows in a skyscraper.
	The focus point contains areas of sharply
	contrasting brightness
	Example: subject is half in the shade.
	Background objects appear larger than the subject
	Example: a building is in the frame behind the subject.

The subject contains many fine details

Example: a field of flowers or other subjects that are small or lack variation in brightness.

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