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
•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
•Do not apply superfluous efforts at work with lens
assembly, agile elements and thread connections.
Due to considerable optical magnification of the
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
2