Nikon D7000, D7000 (Body Only) manual 113

APredictive Focus Tracking

In AF-Cmode or when continuous-servo autofocus is selected in AF-Amode, the camera will initiate predictive focus tracking if the subject moves toward or away from the camera while the shutter-release button is pressed halfway. This allows the camera to track focus while attempting to predict where the subject will be when the shutter is released.

AGetting 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 (I) may be displayed and the camera may sound a beep, allowing the shutter to be released even when the subject is not in focus. In these cases, focus manually (0 99) or use focus lock (0 97) to focus on another subject at the same distance and then recompose the photograph.

There is little or no contrast	The focus point contains
between the subject and the
	areas of sharply contrasting
background.
	brightness.
Example: Subject is the	Example: Subject is half in
same color as the
	the shade.
background.
The focus point contains	Background objects appear
objects at different
	larger than the subject.
distances from the camera.
Example: Subject is inside a	Example: A building is in the
	frame behind the subject.	N
cage.
	The subject contains many
The subject is dominated by	fine details.
regular geometric patterns.	Example: A field of flowers
Example: Blinds or a row of	or other subjects that are
windows in a skyscraper.	small or lack variation in
	brightness.

ASee Also

For information on using focus priority in continuous-servo AF, see Custom Setting a1 (AF-C priority selection, 0 208). For information on using release priority in single-servo AF, see Custom Setting a2 (AF-S priority selection, 0 208). See page 50 for information on the autofocus options available in live view or during movie recording.

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