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ERGONOMICS —
If you will be viewing for a long period of time,
a lighter product will be more comfortable. Also, where you
wish to carry your device will make a difference when deciding
on what size to purchase.
PRACTICALITY —
If you will be using your system on camping
trips and other places where electricity is unavailable, make
sure the battery corresponding to that system is easily available
for purchase.
PRICE —
Famous Trails specializes in creating affordable prod-
ucts for their users, but prices can range from $199 to $10,000.
Think about how often and in what way you will be using your
product and thus how much you want to spend. A scope or
monocular for $2,500 would be a fantastic piece of equipment
to own, but you could also purchase a high definition system
that will satisfy all your needs for under $500.
A Glossary of Night Vision Terms
ANGLE OF VIEW —
the angle (in degrees) of your field of view
when looking through a device.
BINOCULAR —
a device that contains two connected sets of
image intensifiers and optics that share a power source.
BLACK SPOTS —
black spots on an image possibly caused by
foreign substances on the surface of the lenses or marks within
the image intensifier.
BLOOMING —
a situation where a part of the projection has been
overloaded with too much light.
BRIGHT-SOURCE or OVER-LIGHT PROTECTION
— a circuit that will
decrease or shut off power to a product when over-lighting
occurs, protecting the image intensifier. (Over-exposure to bright
light sources can decrease the life of your image intensifier)
Normal viewing will resume within one to two minutes.
DIOPTER —
a measurement unit for the refractive power of a
lens, either for a device or for the human eye.
