Pentax X-5 Operating Manual page 62

Press halfway
This refers to pressing the shutter release button gently to the first
position. This locks the focus setting and the exposure. The green focus
frame lights on the display when the shutter release button is pressed
halfway and the subject is in focus. If the subject is out of focus, the
frame turns white.
Press fully
This refers to pressing the shutter release button all the way down to the
fully depressed position. This takes a picture.
3
Subjects that are difficult to focus on
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 and holding 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
• Intricate patterns
• Fast moving objects
• When there is an object in the foreground and an object in the background in
the captured area
• Strongly reflected light or strong backlighting (bright background)
Instant Review and Blink Detection
The image appears on the display immediately after capturing (Instant
Review). If the camera detects that the subject's eyes are closed while
the Face Detection function is activated, the message [Closed eyes
have been detected] appears for 3 seconds (Blink Detection).
60
Not pressed Pressed halfway
(first position)
Pressed fully
(second position)