Sony DSC-U20 - Manual (Page 28)

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Auto Focus
When you try to shoot a subject that is difficult to focus
on, the AE/AF lock indicator changes to flashing
slowly.
The Auto Focus function may have difficulty working
under the following conditions. In such cases, release
the shutter button, then recompose the shot and focus
again. If the Auto Focus function can still not bring the
subject into focus, use the Focus preset function
(page 37).
• The subject is distant from the camera and dark.
• The contrast between the subject and its background
is poor.
• The subject is seen through glass, such as a window.
• A fast-moving subject.
• The subject reflects or has a lustrous finish, such as a
mirror or a luminous body.
• A flashing subject.
LCD light
You can use [LCD LIGHT] under [ ] with MENU
and v/V on the control button to turn the LCD light on
and off. This is useful for extending the battery life.
• This camera is equipped with a reflective-type LCD screen
that allows you to see the LCD screen even when the LCD
light is turned off, as long as there is some ambient
illumination.
• Even if the LCD light setting is [OFF], the LCD light will
turn on when menu operations are being performed. When
the menu operation is completed, the LCD light will turn off
again.