Newcon Optik NVS 7-4X - Manual (Page 16)

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Solid red dot indicates that the IR illuminator is on.
In the daytime with lens cap on it is normal to observe a fuzzy
image. Switching on the unit device in the daytime is intended
for testing purposes only.
Switching the unit off
After you have finished using the device, turn it off by rotating
switch (1) to OFF position. Put protective lens cap
(ex.NVS7-8x, 7) on the lens. Remove the battery from the
battery compartment to avoid damaging of the device in case of
electrolyte leakage.
Operating at night
Take off the lens cover from the lens (6). Turn on the
device using switch. If lighting is insufficient, turn on the
IR illuminator (1) by turning switch. The red indicator
(Fig. 1) will go on. IR illuminator is effective when
observing an object located not far from the viewer.
The IR illuminator is visible to anybody with a night
vision device.
Adjusting to individual vision
Turn on the device. Direct the device at an object placed within
8-20 m from the viewer. Obtain the sharpest image possible on
the eyepiece (4) screen by focusing the eyepiece lens (3) and
then the objective lens (2).