Pentax K-X - Manual (Page 117)

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F
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You can choose from the following three autofocus modes.
Setting the AF Mode
f
Auto
Switches automatically between l and k modes
according to the subject. (default setting)
• [AF Mode] is fixed to f in I (Auto Picture) mode.
• Even if f is selected, [AF Mode] is fixed to l when
shooting with Live View with the mode dial set to e, K, b, c
or a.
l
Single mode
When the shutter release button is pressed halfway to focus on
the subject, the focus is locked at that position.
• The focus is locked while the focus indicator ] appears in the
viewfinder. To focus on another subject, take your finger off the
shutter release button first, then press the shutter release button
halfway again.
• The shutter cannot be released until the subject is in focus. If the
subject is too close to the camera, move back and take the
picture. Adjust the focus manually if it is difficult to focus on the
subject (p.65). (p.121)
• When the shutter release button is pressed halfway, the built-in
flash will discharge automatically several times, making it easier
to focus on the subject if the subject is in a dark area and the built-
in flash is available.
k
Continuous
mode
The subject is kept in focus by continuous adjustment while the
shutter release button is pressed halfway. Even if the subject is
not in focus, the shutter can be released when the shutter release
button is pressed fully.
• Available only when the mode dial is set to e, K, b, c or a.
• [AF Mode] is fixed to k in \ (Moving Object) of Picture mode
and n (Stage Lighting), R (Kids), Y (Pet) and l (Night Snap)
of
H (Scene) mode.
• When the shutter release button is pressed halfway or the
=/L button is used to adjust the focus, the camera
automatically tracks the subject if it is determined to be a moving
object.
• The built-in flash will not discharge multiple times.