Eyes | Specification
What would someone use, want, or need Big Eyes® for?
A: Big Eyes® are used to improve your view of distant targets. Big Eyes® perform
extremely well in all light conditions from low-light to bright sunshine and are
easy to use. The question should be what wouldn't someone use Big Eyes® for? Big
Eyes® owners use their binoculars to get the most out of their already fantastic
long-range view! Beyond the hundreds of military and law enforcement applications,
Big Eyes® provide civilians the power to view distant objects of their choosing
with clarity and comfort. People watching (voyeurism), astronomy, birding, whale
watching, livestock maintenance, horse races, sailing races, yachting events,
hunting, shooting, surveillance, security, and wishing upon a star are some of
the hundreds of uses for Big Eyes®. Two uses Big Eyes® are not appropriate for
are viewing targets closer than 50 yards with 25x-magnification and 140 yards
with 40x-magnification nor are Big Eyes® appropriate for looking at the sun.
Do I have to choose either 25x or 40x magnification when purchasing Big Eyes®
or do both 25x and 40x magnifications come with each Big Eyes®?
A: Every Big Eyes® comes with both 25x and 40x-magnification eyepieces.
How far can I see with my Big Eyes® ?
A: With Big Eyes® you can see objects
millions and millions of miles away! But, your unaided eyes can also see targets
millions and millions of miles away. We see stars with unaided eyes, right? The
question is not how far can we see, but is what will the target look like, how
big, how bright, how clear, how close will a target appear if a person is looking
through Big Eyes®? Big Eyes® magnify images either 25 times or 40 times depending
on which eyepiece you are looking through. When looking through Big Eyes® 25x
eyepiece a target will look 25 times larger. To get an idea of how the target
will appear divide the distance to the target by the magnification rating. For
example, if you were looking at a person 100 yards (the length of a football field)
away with the 25x-magnification eyepiece that person would appear to be only 4
yards (12 ft.) away! If you were looking at a motorcycle one (1) mile (5,280 ft.)
away through the 40x-magnification eyepiece it would appear only 132 ft. away!
But don't think that magnification is everything, because it is not! There are
many other criteria of importance. The broad spectrum of criteria include: light
gathering; light transmission; relative brightness; twilight factor; detail resolution;
field of view; angle of view; length of eye relief; focusing mechanisms; internal
and external construction integrity; size and weight; durability; lens and prism
quality and coatings. Big Eyes® provide the ultimate combination of quality, performance
and value to people wanting to see details, close-ups and vignettes from a broad,
long distance view.
Are Big Eyes® a "night vision" optical instrument?
A: Big Eyes® are not a light intensifying
optical device, nor are they considered a night vision scope. Big Eyes® do however
gather a relatively enormous amount of light due to their 100mm (nearly 4")
objective lenses and magnesium fluoride multi-coated lenses and do work well at
night when the target is illuminated. For example, if you wanted to observe a
janitor working in a lighted office across the road or across the river at night,
you would see him/her very clearly. The same goes for watching people on dimly
lit streets. As long as you target is illuminated you will see quite well.
Are Big Eyes® considered a wide-angle binocular?
A: Yes, Big Eyes® are considered a wide-angle binocular because their Apparent
Angle of View is greater than 60. Big Eyes® Apparent Angle of View for 25x is
62.5 and for 40x is 60.
What does 'military surplus' mean in the case of Big Eyes®? Are the binoculars
new, 'fresh from the factory'?
A: Big Eyes® are new and are currently
being produced as you read this statement. Military surplus is any product manufactured
for the military, but also sold to the public. Big Eyes® are considered military
surplus because all units are manufactured with the standards and expectation
that they will be used for a military application.
Why use Big Eyes® instead of a spotting scope, telescope or hand-held binoculars?
A: Big Eyes® binoculars are superior to spotting
scopes and telescopes because you don't need to squint or close one eye. Big Eyes®
100mm objective lenses and dual tubes allow both eyes to see super sharp and amazingly
bright details without the eye strain, headaches or eye-water so often associated
with using spotting scopes and telescopes. And because Big Eyes® are a binocular,
not a monocular, your perception of depth and contrast is without comparison.
Telescopes are best to view celestial objects only. Spotting scopes are best to
view terrestrial objects only. Big Eyes® view both celestial and terrestrial objects
with amazing comfort and performance. Big Eyes® sit rock steady atop a variety
of high-performance, high-quality stands and magnify images more brilliantly and
steadier than any hand-held binocular.
Why do Big Eyes® have individual focusing for each eye?
A: Individual focusing binoculars are more adaptable to each individual viewer
and are more sturdy and rugged in construction than all other focusing mechanisms,
making them more dependable. Military services around the world require individual
focusing binoculars for these reasons.
What are the lines in the right eyepiece tube?
A: The network of lines in question is termed the Reticle. The reticle is defined
as a network of fin lines, wire, or the like, placed in the focus of the objective
of an optical tube. The reticle is used to determine the approximate distance
to a selected target and can also be used to determine the approximate size of
a target when the distance is known. If you are having difficulty seeing the reticle
adjust the focus until it is visible. When using the reticle for distance measurement
the focus of the target need not be clear only distinguishable. See Big Eyes®
Owner's Manual to learn how this is done.
How should I clean the lenses of my Big Eyes®?
A: Before wiping and cleaning Big
Eyes® lenses, carefully remove any harmful debris or visible particulate matter
on the lenses. Use the brush provided with your Big Eyes®, a blower brush or compressed
air device to remove any and all particles. Never use your fingers! Never use
household glass or surface cleaners, napkins, paper towels, T-shirts or water
to clean lenses. Only use a clean, soft, lint-free, optical glass appropriate
cleaning towel. If you no longer have the flannelette provided with you Big Eyes®,
visit your local camera store and purchase a high quality cleaning cloth recommended
by a professional optics sales person. Don't touch lens surfaces with your fingers.
If lenses are touched, quickly remove fingerprints and the associated oil, perspiration
and salt. If the binocular is in a salt-water climate wipe metal surfaces with
alcohol to prevent surface deterioration. Don't use alcohol on lens surfaces!
Q: Why can't
I focus on targets less than approximately 50 yards with the 25x eyepiece
or on targets less than approximately 140 yards with the 40x eyepiece?
A: Big Eyes® are a long range binocular and designed as an artillery spotting
scope, thus their closest focal distance need not be under 50 yards. If
the binocular were setup to focus closer than 50 yards certain performance
characteristics would be sacrificed. Also, focusing at objects closer
than 50 yards would cause only a portion of most targets to be visible.
To view targets closer than 50 yards we suggest using a set of hand-held
binoculars with magnification of 10x or less.
Why are targets less bright when looking through the 40x magnification when compared
to the 25x magnification?
A: The reason the 40x magnification is
not as bright as the 25x is because anytime you increase the magnification of
an optic, all else being constant, you decrease its relative brightness. Thus,
the 40x-magnification setting will appear less bright relative to the 25x-magnification
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How can I get my Big Eyes® serviced?
A: Note: See
return policy/procedure and warranty question below.
If your binoculars need
service call Big Eyes Binoculars, L.L.C. to obtain a return authorization number.
Please, keep all packaging materials and hardware in case you must return your
products. You must acquire a return authorization number before returning! Include
your name, telephone number, and a copy of your receipt and service request inside
the shipping container. Upon receiving a return authorization number, write the
number on the outside of the Big Eyes Binoculars approved cardboard shipping container
and return the product via UPS, freight pre-paid and insured for the purchase
price to the following commercial address:
Address for All Service and Repairs
BIG EYES Product Repair - Canada
2011 malaview ave west Sidney BC V8L 5X6
Repair and service phone: (250) 415 2063
Why does the image and target look blurred? How can I resolve this problem?
A: There are three p<DPě>»pfor blurred ©es. The first and most likely reason
for blurred images results from heat radiating off surfaces. This phenomenon is
often referred to as mirage. This is common to all magnifying optical devices
and can only be resolved when radiating heat is less prevalent. Another reason
that a target may look blurred is due to the observer looking through residential
or commercial glass. To eliminate this problem, move Big Eyes® outside, look through
an open window, or move the binocular so that it looks through a different part
of the residential or commercial glass. Avoid looking through residential glass
at an angle. Doing so will decrease the likelihood of image problems. The reason
for blurred, distorted, or unfocused targets can also be a result of dirty lenses,
high humidity, smog and particulate matter in the air or simply a lack of adjustment
to the focusing mechanism.
Why do my Big Eyes® and metal storage case lack aesthetic perfection?
A: Big Eyes® are currently manufactured
for military use and therefore do not require aesthetic perfection. Any minor
aesthetic imperfections of Big Eyes® and their metal storage case are only aesthetic
and do not imply or result in any functional or performance defects. Your Big
Eyes® have been triple check to ensure quality operation and proper performance.
How do I maintain the luster of the simulated leather material that is wrapped
around the binocular?
A: Big Eyes Binoculars recommends the
use of STP's Son Of A Gun Protectant to maintain the luster of the textured surfaces.
STP's Son Of A Gun Protectant can be purchased in most automotive sections of
your local hardware store. When applying such a fluid to Big Eyes® do not spray
directly on the binocular! Spray the fluid on a small cotton towel directed away
from the binocular and wipe on the textured surfaces only. Do not allow fluid
to make contact with lenses!
is Big Eyes Binoculars return policy/procedure and warranty?
A: All BIG EYES™ binoculars are covered by a one year warranty
(from date of purchase) for problems due to manufacturing defects. Repair
or exchange at our discretion.
Problems caused by accident or misuse, regardless of purchase date, shall
be treated as "Out-of-Warranty Repair".
Are Big Eyes® waterproof?
A: No. Big Eyes® are not waterproof and
should not be exposed to moisture including snow and rain.
Eyes | Specification