Nikon D700 - Manual (Page 418)

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The Low-Pass Filter
The image sensor that acts as the camera’s picture element is fitted
with a low-pass filter to prevent moiré. If you suspect that dirt or
dust on the filter is appearing in photographs, you can clean the
filter using the Clean image sensor option in the setup menu.
The filter can be cleaned at any time using the Clean now option,
or cleaning can be performed automatically when the camera is
turned on or off.
❚❚“Clean Now”
1
Place the camera base down.
Image sensor cleaning is most effective
when the camera is placed base down as
shown at right.
2
Display the
Clean image
sensor menu.
Highlight Clean image sensor
in the setup menu and press 2.
D Image Dust Off
The Image Dust Off option in Capture NX 2 can not use dust off reference
data recorded before image sensor cleaning is performed to retouch
photographs taken after image sensor cleaning is performed. If you
intend to use Image Dust Off with photographs recorded after image
sensor cleaning is performed, we recommend that you record dust off
reference data after cleaning the image sensor.
A Image Sensor Cleaning
If the options described in this section are not sufficient to remove dust or
other foreign objects from the image sensor, clean the sensor manually as
described on page 395.