Nikon D780 DSLR Camera (Body Only) - Manual (Page 874)

828 Technical Notes
1
Turn the camera off and remove the lens.
After removing the lens, turn the camera on.
2
Highlight [Lock mirror up for
cleaning] in the setup menu
and press
2 .
The camera will prepare to lock the
mirror up.
3
Press J .
• The mirror will be raised and the shutter curtain will open.
• The display in the control panel
will flash. The display in the
viewfinder will turn off.
• To restore normal operation
without inspecting the low-pass
filter, turn the camera off.