Nikon D80 Manuel D’Utilisation

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Reference: More on Photography (All Modes) / Focus
More on Photography (All Modes)
Focus
Focus can be adjusted automatically (see “ Autofocus,” below) or manually (  32).  The user 
can also select the focus area for automatic or manual focus (  30) or use focus lock to focus 
to recompose photographs after focusing (  31).
Autofocus
Controls used: Focus mode selector
When the focus mode selector is set to AF, the camera focuses au-
tomatically when the shutter-release button is pressed halfway.  In 
single-area AF, a beep will sound when the camera focuses.  No 
beep will sound when AF-A is selected in   (sports) mode or when 
continuous-servo autofocus is used (note that continuous-servo 
autofocus may be selected automatically when shooting moving 
subjects in AF-A autofocus mode).
If the lens does not support autofocus or the camera is unable to focus using autofocus, use 
manual focus (  32).
   A-M Selection/Autofocus with Manual Priority
If  the lens is equipped with A-M selection or an M/A-M switch, select A 
(autofocus) or M/A (autofocus with manual priority).
   The AF-Assist Illuminator
If the subject is poorly lit, the AF-assist illuminator will light automatically to 
assist the autofocus operation when the shutter-release button is pressed 
halfway.  The AF-assist illuminator will not light in 
, or 
 modes or if 
Off  has been selected for Custom Setting 4 (AF assist;   87).  The illumina-
tor has a range of about 0.5–3.0 m (1 ft.  8 in.–9 ft.  10 in.); when using the 
illuminator, use a lens with a focal length of 24–200 mm and remove the 
lens hood.
   1 — Beep (  86)
This option can be used to turn the beep speaker on or off .
More on Photography (All Modes)
Focus