Nikon D100 - Manual (Page 198)

Technical Notes—Caring for Y
our Camera
186
Caring for Your Camera
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
foreign objects from adhering directly to the CCD, under certain conditions
dirt or dust on the filter may appear in photographs. If you suspect that dirt
or dust inside the camera is affecting your photographs, you can check for
the presence of foreign objects on the low-pass filter as described below.
1 Turn the camera off and connect an EH-5 AC adapter (available separately).
If you do not have access to an EH-5 AC adapter, take the camera to a
Nikon-authorized service center.
2 Remove the lens and turn the camera on.
3 Press the MENU button and select Mirror Lock-up from the setup menu
(
163). Highlight CCD Cleaning and press the multi selector to the
right. The message, “Press shutter-release button” will be displayed in the
camera monitor, and a row of dashes will be displayed in the control panel
and viewfinder.
4 Press the shutter-release button all the way
down. The mirror will be raised and the shut-
ter curtain will open, revealing the low-pass fil-
ter, and the row of dashes in the control panel
will blink.
5 Holding the camera so that light falls on the
low-pass filter, examine the filter for dust or
lint. If you find a foreign object on the filter,
you will need to have it cleaned. See the fol-
lowing section.
Mirror Lock-up
OFF
CCD Cleaning
OK
OFF
ON
SET UP