Nikon D70-series User Manual page 195

The Low-Pass Filter
The image sensor that acts as the cam era's picture element is fi tted with a low-
pass fi lter to prevent moiré. Al though this fi lter prevents foreign objects from
adhering directly to the image sensor, under certain con di tions dirt or dust on
the fi lter may appear in photographs. If you suspect that dirt or dust in side
the camera is aff ecting your pho to graphs, you can clean the fi lter as described
below. Note, however, that the low-pass fi lter is extremely delicate and easily
damaged. Nikon recommends that fi lter be cleaned only by Nikon-authorized
service personnel.
1
Remove the lens and turn the camera on.
2
Display the Mirror Lock-up menu and press
the multi selector right (
option is not available at battery levels of
or below, while shooting multiple exposures, or
when using an optional MB-D200 battery pack
with AA batteries). The message shown at right
will be displayed and a row of dashes will appear
in the control panel and viewfi nder. To return
to normal operation without raising the mirror,
turn the camera off .
3
Press the shut ter-re lease but ton all the way
down. The mir ror will be raised and the shut ter
cur tain will open, re veal ing the low-pass fi l ter,
and a row of dashes will blink in the control pan-
el. The display in the viewfi nder will turn off .
Use a Reliable Power Source
The camera shutter curtain is delicate and easily damaged. If the camera powers off while
the mirror is raised, the shutter curtain will close automatically. Observe the following pre-
cautions to prevent damage to the curtain:
• Use a fully-charged battery or an EH-6 AC adapter (available separately) for prolonged
inspection or cleaning of the low-pass fi lter.
• Do not turn the camera off or remove or disconnect the power source while the mirror is
raised.
• If the battery runs low while the mirror is raised, a beep will sound and the AF-assist il-
luminator will blink to warn that the shutter curtain will close and the mirror will lower in
about two minutes. End cleaning or inspection immediately.
117; note that this
185