Cleaning The Cmos Sensor; Removing Dust With Ultrasonic Vibrations (Dust Removal) - Pentax K-5II Operating Manual

Cleaning the CMOS Sensor

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If the CMOS sensor becomes dirty or dusty, shadows may appear in the
image in certain situations such as when shooting against a white
background. This indicates that the CMOS sensor must be cleaned.
Removing Dust with Ultrasonic Vibrations
(Dust Removal)
Dust adhering to the CMOS sensor is removed by applying ultrasonic
vibrations to the filter on the front surface of the CMOS sensor.
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.
Set [Start-up Action] to O (On) to turn the
Dust Removal function on every time the
camera is turned on.
When Dust Removal is completed, the
camera returns to the [R Set-up 4] menu.
11
Dust Removal
Dust Removal
Start-up Action
MENU Start
OK