Pentax Optio 450 Operating Manual page 27

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Press the shutter release button.
The image will be displayed on the LCD monitor for 2 seconds
(Instant Review) and recorded on the SD Memory
Card/MultiMediaCard. (The green and red lamps on the right of the
viewfinder blink alternately while the image is being recorded on the
SD Memory Card/MultiMediaCard.)
Using the Shutter Release Button
The shutter release button works in a two-step action.
b Press halfway
When the shutter release button is pressed lightly (halfway), the
focus and exposure are locked.
They remain locked while the button is pressed halfway, and the
shutter speed and aperture are displayed on the LCD monitor.
You can find the following information on the LCD monitor, the status
lamp and the flash lamp.
Autofocus area
If the subject is in focus, the frame will light green. If the subject is
out of focus, the frame will not appear.
Focus status lamp & Flash status lamp
status Focus status lamp (green)
lit Subject is in focus
blink Subject is out of focus
You cannot take a picture while the flash is charging.
b Pressed down fully
The picture is taken.
Instant Review
The Instant Review default setting is 2 seconds. During this time you
can delete the image by pressing the
will be displayed.), and selecting [Delete], and then pressing the OK
button. To start recording a voice memo, press the OK button during
Instant Review. Press the OK button again to stop recording.
Setting the Instant Review Time
Flash status lamp (red)
Flash is charged
Flash is charging
button (The [Delete] menu
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