Pentax Optio E30 Operating Manual page 39

Using the Shutter Release Button
The shutter release button works in a two-step action as follows.
Press halfway
The focus and exposure are locked when the shutter release button is
pressed halfway. The green focus frame lights on the LCD monitor when
the shutter release button is pressed halfway and the subject is in focus.
If the subject is out of focus, the frame will light red.
Press fully
Press the shutter release button all the way down to take the picture.
[Poor focusing conditions]
The camera may not be able to focus under the following conditions.
In these cases, lock the focus on an object the same distance away
as the subject (by pressing the shutter release button halfway), then
aim the camera at your subject and press the shutter release button
fully.
• Objects that lack contrast such as a blue sky or white wall
• Dark places or objects, or conditions that prevent light being reflected
back
• Horizontal lines or intricate patterns
• Fast moving objects
• When there is an object in the foreground and an object in the background
in the same picture
Instant Review
The image appears on the LCD monitor for one second (Instant Review)
immediately after it is captured. You can change the Instant Review time.
(p.79)
You can delete the image during Instant Review by pressing the i button.
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