Pentax ist - Manual (Page 96)

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1
Set the focus mode switch
to .
2
Frame the subject, then turn
the focusing ring to the right
or the left until the subject
is in focus.
3
When the subject comes
into focus, the focus
indicator
lights up and
the audible PCV signal
beeps.
ABOUT FOCUSING
Manual Focusing
When you focus manually, you can either check with the focus
indicator
or the viewfinder’s matte field to adjust focus.
Using the focus indicator