Nightwitness is a sophisticated precise optical instrument equipped with electronics.
Therefore, it should be handled with due care.
•Try to avoid strong heat, direct sunlight, impacts, dust, moisture and sudden changes of
temperatures. Keep it in mind that, although being very durable, Nightwitness contains fragile
components.
•Do not touch the optical surfaces with fingers. Doing so may damage the antireflection coating.
•Cleaning of optical surfaces should only be performed 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 battery during periods of non-operation
and when storing the device for long period of time.
•Do not apply unnecessary pressure to the lens assembly, agile elements & 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.

PRECAUTIONS

7
Warning !Warning !
Warning !Warning !
Warning !
Image Intensifier possible defects table.
Clarity of Image Intensifier tube is check against the table below:
Íîìåð
çî í û Ðàçì åð çîí ,
ìì
Í àèáîëüøèé äèàìåòð òî ÷åê, ì ì Äî ïóñòèì àÿ ñóì ìà ðíàÿ
ïëî ùàäü äåôåêòîâ,,
ìì 2
íå
ó÷èòû âàåì ûõ
äî ï óñòèì û õ
ïî ðàçìåðó, ì ì ï î êîëè÷åñòâó
1
2
3
0...9,0
9,0...14,5
14,4...18,0
0,06
0,08
0,1
0,15
0,25
0,35
1
2
2
0,12
0,27
0,45
TECHNICAL SPECIFICATIONS (CONT)
6
ZONE
NUMBER
CIRCULAR ZONE
DIMENTIONS, MM
FIELD OF VIEW CLEANNESS:
NEGLECTED
ADMITTED
DIAMETER, MM QUALITY
ADMITTED TOTAL
AREA OF DEFECTS, MM2