Pentax K-5 II S Operating Manual page 356

CAUTION
• When using the Quick-shift Focus System, keep pressing the shutter release button
after you achieve focus and before taking a picture. If you let go of the shutter release
button before taking a picture, autofocus will operate again when you press the shutter
release button again.
However, by configuring the camera's custom settings, you can take pictures without
autofocusing after letting go of the shutter release button. See the camera operating
manual for details about the setting procedure.
• When focusing with manual focus or the Quick-shift Focus System, the mechanism
allows the focusing ring to rotate freely after it is set to the
oo
(infinity) or the minimum
focus distance ends. However do not attempt to rotate it any farther than these ends
as this will result in decreased performance.
- DA 14mm F2.8ED [IF] - DA
*
55mm F1.4 SDM
- DA
*
200mm F2.8ED [IF] SDM - DA
*
300mm F4ED [IF] SDM
- DA
*
16-50mm F2.8ED AL [IF] SDM - DA
*
50-135mm F2.8ED [IF] SDM
- DA
*
60-250mm F4ED [IF] SDM