Focusing; Using The Autofocus - Pentax K20D User Manual

Focusing

104
You can focus with the following methods.
Autofocus
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Manual focus
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Using the Autofocus

You can also choose the autofocus mode from l (Single mode) where
the shutter release button is pressed halfway to focus on the subject and
4
the focus is locked at that position, and k (Continuous mode) where
the subject is kept in focus by continuous adjustment while the shutter
release button is pressed halfway. The factory default setting is l.
1
Set the focus mode lever to
l or k.
l
k
The camera is focused when the shutter release
button is pressed halfway.
Manually adjust the focus.
When the shutter release button is pressed
Single mode halfway to focus on the subject, the focus is
locked at that position.
The subject is kept in focus by continuous
adjustment while the shutter release button
Continuous mode is pressed halfway. Even if the subject is not
in focus, the shutter can be released when
the shutter release button is pressed fully.