2
Precautions
NVS 4 is a sophisticated precise optical instrument
equipped with electronics.
Therefore, it should be handled with due care.
• Keep your device away from direct sunlight,
impacts, dust, moisture,
and sudden changes of temperatures.
• Do not touch the optical surfaces with fingers.
Doing so may damage the anti-reflection coating.
• Cleaning of optical surfaces is allowed only with
professional camera lens cleaning supplies.
• Use only a soft clean cloth to clean the exterior of
the device.
• Do not take the cover off the lens if not necessary.
• Keep away from heating appliances and central
heating.
• Make sure to switch off the unit and remove the
batteries during periods of non-operation and when
storing the device for long period of time.
• Do not apply superfluous efforts at work with lens
assembly, agile elements and thread connections.
Due to considerable optical magnification of the eye-piece
some
small structures inside the tube coating in the form of dark
and/or white points may be seen in the field of view which
does not affect
the serviceability of the device
