Pentax 12195 사용자 설명서

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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.

Shaking the CMOS sensor removes dust that has collected.

1

Select [Dust Removal] in the [R Set-up 3] 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 and 
off, set [Start-up Action] and [Shut-down 
Action] to O.
When Dust Removal is completed, the camera returns to the [R Set-up 
3] menu.

Use a brush-less blower to remove dirt and dust from the CMOS sensor. Using 
a blower with a brush may scratch the CMOS sensor. Do not wipe the CMOS 
sensor with a cloth.