Nikon COOLPIX P310 Reference Manual page 97

The focus area or focus range for ad]usting focus varies depending on the
shooting mode and focus mode (_66).
• In P, S, A,
M or U
mode, an area (:an be set to adjust focus by selecting AF
area mode (_55) in the shooting menu.
• The camera may be unable to focus on the subjects for which autofocus does
not perform as expected (_29). If the camera does not focus, try pressing the
shutter-release button halfway several times or try focus lock (_81) or manual
focus (_2).
Using the Target Finding AF
When AF area mode in I_1 (auto) mode or P, S, A, M or U mode is set to
Target finding AF, the camera will adjust the focus during the following
operations if you press the shutter-release button halfway.
• When the camera detects the main subject, it
focuses on that subject. When the subject is in focus,
the focus areas (up to twelve areas) that match up
with the size of the subject will light in green.
When detecting a human face, the camera focuses
on it as a priority.
• The camera has nine focus areas, and if it does not
detect the main subject, it automatically selects the
focus areas containing the subject closest to the
camera. When the subject is in focus, the focus areas
that are in focus (up to nine areas) light in green.
Focus'area
oo
Notes on Target Finding AF
• Depending on shooting conditions, the subject that the camera determines to be the main
subject may vary.
• The camera may not detect the main subject appropriately in the following situations:
When the image shown on the monitor is very dark or bright
When the main subject lacks clearly defined colors
When the shot is framed so that the main subject is on the edge of the monitor
When the main subject is composed of a repeating pattern
• The camera has nine focus areas, and in the following situations, it automatically selects the focus
areas containing the subject closest to the camera;
When White balance is set to Preset manual, Incandescent or 1 in Fluorescent
When Picture Control is set to Monochrome
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