Nikon D330018-55VR User Manual (en)

Technical Notes
Turn the camera off.
The mirror will return to the down position and the shutter 
curtain will close. Replace the lens or body cap.
Use a Reliable Power Source
The shutter curtain is delicate and easily damaged. If the camera 
powers off while the mirror is raised, the curtain will close 
automatically. To prevent damage to the curtain, observe the 
following precautions:
• 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 self-timer lamp will flash to warn that the shutter curtain will 
close and the mirror will be lowered after about two minutes. End 
cleaning or inspection immediately.