Congratulations on the purchase of your Bushnell Night
Vision Product. Bushnell Night Vision products are comprised
of high quality image intensifier tubes and optics. Bushnell
Night Vision products amplify existing light, allowing you to
see in dark conditions too dark for the naked eye.
HOW NIGHT VISION WORKS
Bushnell Night Vision products collect and amplify existing light
through the objective lens, which is then focused on the image
intensifier. Inside the intensifier, a photocathode is "excited" by the
light and converts the photon energy into electrons. These electrons
accelerate across an electrostatic field inside the intensifier and strike
a phosphor screen (like a green monochrome TV screen) which emits
an image that you can see. It is the acceleration of electrons, which
provides gain and enhances the image. This is a Generation I device.
USER’S GUIDE
Batteries
• Model 26-2440 Night Vision Scope utilizes a self energizing power
supply and does not require batteries. The IR Illuminator requires a
3 volt battery, see list below.
Using The Power Lever
(See pic. 1)
•
Never turn the scope on in daylight conditions with the lens cap
off.
The pinhole in the lens cap allows you to test the scope in
daylight conditions.
• To activate the scope,
squeeze and
release
the Power Lever, located on
the top of the scope.
• The image will eventually fade out,
this is normal and not a defect.
Squeeze the Power Lever again to
reactivate the scope.
Optional Illuminator
(See pic. 2)
• Your Bushnell Night Vision Product includes an infrared illuminator.
This allows you to see in complete darkness when no ambient light
source is available.
• Install the Illuminator by inserting the screw-mount onto the side
of the scope.
• The Illuminator requires a 3 volt
2L76 battery.
• Rotate the Illuminator button
clockwise to the “ON” position.
• Be certain to switch the Illuminator
“OFF” when not in use.
To Focus
(See pic. 3)
• First, adjust the Objective Lens to
∞
as
shown in picture 3.
• While looking at a distant object
(at least 82 ft./25m away), adjust
the Eyepiece Focusing Ring for the
sharpest image.
• Once the Eyepiece Focusing Ring is
adjusted, you only have to adjust the
Objective Lens as needed.
TROUBLESHOOTING
Spots in the Image.
You may see spots in the image. These vary from scope to scope and
are cosmetic blemishes inside the scope. These are normal for Night
Vision scopes and are
NOT
a defect.
Scope will not turn on.
Squeeze and release the Power Lever firmly and completely.
Image is not focused.
Adjust the focus on the Eyepiece. Adjust the Objective Lens. You
must be at least 4.4 ft./1.3 meters from the subject you are viewing.
If no improvement, clean lenses, they may be foggy or dusty.
(See
To Focus
).
Visibility decreases or disappears.
Bright light sources such as headlights may cause visibility to degrade
or disappear completely. Turn the scope away from the light source.
The unit will restore itself in 1 or 2 minutes. Squeeze and release the
Power Lever to reactivate the scope. Conditions such as fog or
extremely dark environments will decrease visibility.
Scope flashes.
The scope may flash when used in a bright environment. It may also
flash during the first few seconds of use in dark environments.
Illuminator Battery Chart
• Duracell DL 1/3N
• Eveready 2L76
• Kodak K58L
• Sanyo (other) CR 1/3N
• Radio Shack 23-265A
CARE & MAINTENANCE
• When not using for an extended amount of time, store the product
in a dry location.
• Avoid turning the product on in extremely bright light conditions.
• Handle this product like you would a camera. Though Bushnell
Night Vision products are durably constructed, the image
intensifier tube consists of glass and is subject to breakage.
• Keep the optics clean. We recommend using a camera cleaner kit to
clean the outside of the objective and eyepiece lenses. Follow the
directions with the kit.
• Do not disassemble this product. Unauthorized disassembly not
only voids the warranty but may also cause damage from the lack
of special tools and techniques.
NIGHT VISION
I N S T R U C T I O N S
Lit. #: 06-2440/03-01
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2
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26-2440 2.4x40
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