How To Use The Quick-Shift Focus System - Pentax 17-70mm - 17-70mm f/4 DA SMC AL IF SDM Lens Operating Manual

How to use the Quick-Shift Focus System

1. Using Autofocus
Set the focus mode switch to autofocus, then press the shutter release button halfway to
autofocus.
With the
AF button to focus.
With the
or
page 16, you can focus by pressing the OK button.
2. Hold down the shutter release button halfway (or hold down the AF button or OK
button), then turn the focusing ring to finely adjust focus.
3. Finally, press the shutter release button fully to take a picture.
The focusing ring on some lenses may rotate during autofocus.
• Do not touch the focusing ring while autofocus is operating as it may cause a
malfunction. For more information see the "CAUTION" on page 17.
, , or
,
cameras set as explained in "Focusing with the OK Button" on
/ cameras, you can also press the
, , , ,
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