Pentax smc DA 18-250mm f/3.5-6.3 Operating Guide (en)

During autofocusing, the focusing ring of following lenses will rotate.
• To prevent malfunction, do not touch the focusing ring during autofocusing.
- DA 16-45mm f/4ED AL
- DA 18-55mm f/3.5-5.6 AL
- DA 50-200mm f/4-5.6ED
- DA 40mm f/2.8 Limited
• When using the Quick-Shift Focus System, keep pressing the shutter button (or AF
button) after you achieve focus and before taking a picture. If you let go of the shutter
button before taking the picture, you will have to focus all over again when you press
the shutter button again.
In the following cases, you can take the picture without autofocusing after letting go
of the shutter button.
• With the 
, set the “AF with Press Halfway” Custom Function to off. To
autofocus, press the AF button.
• With the 
and the
camera, use the Custom menu to set “AF
cancel” for “OK btn when shooting”. This will enable you to focus manually while you
hold down the OK button.
The setting procedure and more details are explained in the camera’s instruction
 06-2006 DA_Body_E  05.4.27 15:51  Page 12