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TECHNICAL NOTES—CARING FOR YOUR CAMERA
Caring for Your Camera (continued)
Cleaning the low-pass filter
The charge-coupled device (CCD) that acts as the camera’s picture element is fitted
with a low-pass filter to prevent moiré. Although this filter prevents dirt from adher-
ing directly the CCD, under certain shooting conditions dirt or dust on the filter may
appear in photographs. In this case it will be necessary to clean the filter.
Determining Whether the Filter Requires Cleaning
The following two methods are available for determining whether the filter requires
cleaning:
1
To ensure that the shutter is not damaged, this procedure requires that the cam-
era be powered by an EH-4 AC adapter (available separately). Turn the camera
off and connect the adapter.
2
Remove the lens and turn the camera on.
3
Press the button and press the multi selector up or
down to select the custom settings menu.
0
1
2
3
4
A
ON
OFF
OFF
OFF
5
6
N
Bank Select
Image Review
EV Step
BKT Order
AF Activation
Anti-mirror
Focus Area
CSM MENU
OK
F8
Mirror Lock-up
for CCD Cleaning
OFF
ON
OFF
CCD Cleaning
CSM MENU
4
After pressing the multi selector to the right to enter the
custom settings menu, press the multi selector up or down
to highlight Custom Setting 8 (Mirror Lock-up for CCD
Cleaning) and then press the multi selector to the right
to display the menu of options shown at right.
5
Highlight CCD Cleaning and press the multi selector to the right. The mirror
will be raised to the cleaning position and the shutter curtain will open, revealing
the low-pass filter.
6
Holding the camera so that light falls on the low-pass
filter, examine it for dirt or dust. Should you find a
foreign object on the filter, clean it as described below.
If there is no dirt on the filter, display the Mirror Lock-
up for CCD Cleaning sub-menu as described in
steps 3 and 4 and select the OFF option. The mirror
will return to the down position and the shutter curtain will close.