Nikon D500 - Manual (Page 372)

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Cleaning : When cleaning the camera body, use a blower to gently remove
dust and lint, then wipe gently with a soft, dry cloth. After using the
camera at the beach or seaside, wipe off any sand or salt using a cloth
lightly dampened in pure water and then dry the camera thoroughly. In
rare instances, static electricity may cause the LCD displays to light up or
go dark. This does not indicate a malfunction, and the display will soon
return to normal.
The lens and mirror are easily damaged. Dust and lint should be gently
removed with a blower. When using an aerosol blower, keep the can
vertical to prevent discharge of liquid. To remove fingerprints and other
stains from the lens, apply a small amount of lens cleaner to a soft cloth
and wipe the lens carefully.
See “Image Sensor Cleaning” ( 0 338, 341) for information on cleaning
the image sensor.
Lens contacts : Keep the lens contacts clean.
Do not touch the shutter curtain : The shutter curtain is extremely thin and
easily damaged. Under no circumstances should you exert pressure on
the curtain, poke it with cleaning tools, or subject it to powerful air
currents from a blower. These actions could scratch, deform, or tear the
curtain.
The shutter curtain may appear to be unevenly colored, but this has no
affect on pictures and does not indicate a malfunction.