Operation Manual

Precautions
NS-156 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 possible only with professional
camera lens cleaning supplies.
• To clean the exterior of the device, use only a soft clean cloth.
• 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 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 eyepiece 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.
3. COMPONENTS
NS-156 is supplied with the following components:
NAME QUANTITY
NS-156 unit 1
Soft case 1
AA Battery (optional) 2
Weaver weapon mount assembly 1
Lens cap 1
AP-9 I/R Illuminator 1
Manual 1
Warranty Registration Card 1
8. CARE AND MAINTENANCE
• Maintenance includes only replacing the batteries and cleaning of
parts if necessary.
• The batteries are to be replaced after their discharge; if there is no
lit screen after switching on the device or it is very dim; or if a
leakage of batteries has been discovered.
• The dirty parts are to be cleaned with a soft cloth or cotton wool.
• In case of electrolyte leakage the battery compartment must be
carefully cleaned. Alkaline batteries are therefore recommended
• When cleaning optical parts of the lens and eyepiece please to
remove solid dust particles with a jet of air first. Then after giving
a sigh out on the surface clean it with a soft cloth making circle
moves in the direction from the center to the rim.