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NOB5X
NOB3X
NONB2FF
MODEL FEATURES
4
Performance
under Various
Light Conditions
Complete Darkness
Your Night Vision device works
by amplifying available natural
light. In complete darkness, with
no available natural light, you
cannot see without the use of the
Infrared Illuminator (IR). The IR
works like a flashlight, but is
invisible to human and animal
eyes.
Half-Moon
A half-moon provides a substan-
tial amount of ambient light to be
amplified by the internal
Electronic Intensifier Tube.
Without the assistance of the IR,
you can recognize a man-sized
object about 100 yards away.
Quarter-Moon
A quarter-moon provides the
minimal amount of ambient light
to allow viewing unassisted by
the IR. Without the IR illuminat-
ed, a man-sized object can be
recognized about 60 yards away.
With the IR illuminated, this dis-
tance is more than 100 yards.
The IR will greatly improve target
recognition.
Urban Environment
(with man-made light sources)
Streetlights and headlights will
generally not damage the
Electronic Intensifier Tube, if a
safe distance away. As a precau-
tion, do not point the device
directly into a light source. At a
distance of more than 30 yards,
most common man-made light
sources will generally not dam-
age the device.
How Night Vision Works
Light coming into the device from the direction of the object is gathered by the objective lens
and focused onto the Image Intensifier Tube.
The front of the Image Intensifier Tube contains a photocathode which converts light into electrons.
The device contains a very high voltage power supply, which converts the 3 volts supplied by
the batteries into 17 kilovolts.
The high voltage hurls the electrons into the phosphorous screen. The phosphorous screen
illuminates with an image when struck by electrons. The eyepiece optic then focuses the phos-
phorous screen image to your eye.
Troubleshooting
Unit may require several seconds after power-on for image to appear. This is normal.
Focus Problems
Try in lighted environment with lens cap on.
Are you able to focus the eyepiece?
• YES - Use in dark with lens cap off but do not rotate eyepiece.
• NO - Call our Customer Service Line
Unit does not turn on.
Light does not illuminate when button is pressed.
• Check to see if batteries are installed correctly
• No batteries or Dead batteries
• Power light on, but no image
• Unit could be defective, call our Customer Service Line
Image is too dark
• Use the Infrared (IR) Illuminator
• Take off the lens cap
Projected image is dim.
• Batteries are low – insert new batteries
5