40
HP Photosmart R817/R818 User’s Manual
Using Focus Lock
Focus Lock
allows you to focus on a subject that is not in the
center of the picture, or to capture action shots more quickly
by pre-focusing in the area where the action will occur. You
can also use
Focus Lock
to help achieve focus in low light or
low contrast situations.
1.
Frame the subject for your
picture, or a higher contrast or
brighter object, within the focus
brackets.
2.
Press the
Shutter
button halfway
down to lock the focus and
exposure.
3.
Continue to hold the
Shutter
button halfway down while you
re-frame or adjust your subject
for proper positioning.
4.
Press the
Shutter
button all the
way down to take the picture.
Optimizing Exposure
When you press the
Shutter
button halfway down to auto
focus, the camera also measures the light level to set the
proper exposure and displays the exposure settings (F-
number and shutter speed) in the Image Display. If the
camera determines the scene will require a very long
exposure, (shaking hand icon) appears. The camera will
take the picture, but it will likely be blurry. Try one of the
following:
•
Set the flash to
Auto
or
Flash On
(see page 47) to
increase the lighting.
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