Nikon 13187 User Guide (en)

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Autofocus mode can be selected by pressing the AF-
mode button and rotating the main command dial 
until the desired setting is displayed in the viewfinder 
or control panel.
AF-A
AF-S
AF-C
A
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 
(
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 (
0 103) or use focus 
lock (
0 102) to focus on another subject at the same distance and then recompose the 
photograph.
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 
areas of sharply contrasting 
brightness
.
Example
: Subject is half in 
the shade. 
The focus point contains 
objects at different distances 
from the camera
.
Example
: Subject is inside a 
cage. 
Background objects appear 
larger than the subject.
Example
: A building is in the 
frame behind the subject.
The subject is dominated by 
regular geometric patterns
.
Example
: Blinds or a row of 
windows in a skyscraper.
The subject contains many 
fine details
.
Example
: A field of flowers or 
other subjects that are 
small or lack variation in 
brightness. 
A
See Also
For information on using focus priority in continuous-servo AF, see Custom Setting a1 (AF-C 
priority selection
 
For information on using release priority in single-servo AF, see 
Custom Setting a2 (AF-S priority selection
 
See page 51 for information on the 
autofocus options available in live view or during movie recording.
AF-mode button Main command 
dial