Pentax K-r Operating Manual page 125

2
Look through the viewfinder and
press the shutter release button
halfway.
The focus indicator ] appears and you
will hear a beep when the subject comes
into focus. (When blinking, the subject is
not in focus.)
1 Subjects that are difficult to focus on
(p.73)
Using the =/L Button to Focus on the Subject
You can set the camera so that focusing is performed when the =/L
button is pressed. Use this setting when the autofocus by pressing the
shutter release button halfway is not desired.
1
Select [AF/AE-L Button] in the [A Rec. Mode 4] menu and
press the four-way controller (5).
The [AF/AE-L Button] screen appears.
Focus Indicator
123
4