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Precautions
DN 463 is a sophisticated precise optical instrument
equipped with electronics. It should be handled with due
care:
Unit contains fragile components. Avoid impacts,
dust, moisture and sharp changes of temperature.
Do not touch the optical surfaces other than for
cleaning. Doing so may damage the anti-reflection
coating.
Clean optical surfaces with professional lens cleaning
supplies.
Use only a soft clean cloth to clean the exterior of the
device.
Keep away from sources of heat, such as heating
appliances, sunlight or central heating.
Switch off the unit and remove the battery during the
extended periods of non-operation.
Do not keep the device at temperatures higher than
60
o
C (140
o
F).
Do not apply excessive force or pressure to the lens
assembly, movable parts and thread connections.
Small dark and/or light points may be seen in the field
of view due to considerable optical magnification of
the eyepiece. This does not affect the operational
capabilities of the device.