Nikon D50 Manuel D’Utilisation

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 ob-
jects 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 affecting your pho to graphs, you can check for 
the pres ence of for eign ob jects on the low-pass fi lter as described below.

1

 Remove the lens and turn the camera on.

2

 Choose Yes for the Mirror Lock-Up option 

in the setup menu (

  68).  The mes sage, 

“Press shutter-release but 

ton” will be dis-

played.

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 panel.

4

 Holding the camera so that light falls on the 

low-pass fi lter, ex am ine the fi lter for dust or 
lint.  If there are for eign ob jects on the fi lter, 
the fi lter requires cleaning.  See the fol low ing 
sec tion.

5

 Turn the camera off.  The mirror will return to the down position and 

the shutter curtain will close.  Replace the lens or body cap and dis-
connect the AC adapter.

To  prevent the camera from powering off while the mirror is raised, use a fully-
charged battery or an EH-5 AC adapter (available separately) for prolonged inspec-
tion or cleaning of the low-pass fi lter.