Nikon 20x120 IV Telescopic Binoculars with Fork Mount - Manual (Page 15)

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About waterproof and fogproof:
• All models shown are waterproof, and will suffer no damage to the optical system if submerged or dropped
in water to a maximum depth of 2 m (6.6 ft) meter for up to 10 minutes .
• Can be used in conditions of high humidity, dust and rain without risk of damage.
• Nitrogen-filled design makes them resistant to condensation and mold.
Observe the following when using these products:
• The binocular telescope cannot be used underwater. Also, do not subject it to strong water pressure such as
from running water.
• Any moisture should be wiped off before adjusting movable parts of these products to prevent damage.
To keep your binocular telescope in excellent condition, regular servicing by authorized dealer is
recommended.
Cleaning lens
When cleaning the binocular telescope’s objective lenses using an aerosol-type dust cleaner, make sure to
hold the can upright at least 30 cm (11.8 in.) from the lens surface while moving the can to avoid focusing the
vaporized liquid gas on one point.