Pentax K-X - Manual (Page 287)

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11
Cleaning the CMOS Sensor
Shadows may appear in the image on white backgrounds and other
shooting conditions if the CMOS sensor becomes dirty or dusty. This
indicates that the CMOS sensor must be cleaned.
Shaking the CMOS sensor removes dust that has collected.
1
Select [Dust Removal] in the [R Set-up 4] menu and press
the four-way controller (5).
The [Dust Removal] screen appears.
2
Press the 4 button.
The Dust Removal function is activated
by shaking the CMOS sensor.
To activate the Dust Removal function
every time the camera is turned on, select
[Start-up Action] and use the four-way
controller (45) to select O.
When Dust Removal is completed, the
camera returns to the [R Set-up 4] menu.
Removing Dust by Shaking the CMOS Sensor
(Dust Removal)
Dust Removal
MENU
Dust Removal
Start-up Action
Start OK