Roll-Down Eyecups
Orion Astro-Binoculars feature fold-down eyeguards. The eye-
guards are usually left in the up position for use without eyeglass-
es, as this helps prevent glare (unwanted stray light) from enter-
ing between your eye and the eyepieces. To use the binoculars
with eyeglasses, you will need to fold the eyeguards down in order
to get your eyes close enough to the eyepieces to see the entire
field of view.
Cleaning and Care of Binoculars
The lens surfaces of Orion binoculars are coated with anti-reflec-
tion coatings that can be damaged with careless handling. Avoid
touching lens surfaces with fingers or any coarse material. All
optics, even if stored, should be cleaned at least once a year or
whenever they are dirty. The dust that builds up on coatings pro-
motes mold growth, which etches glass and destroys coatings.
Avoid over-cleaning; it can damage the coatings. Always use lens
cleaning tissue and fluid that are specifically designed for multi-
coated lenses. Do not use fluids or tissues that are for eyeglasses
or household use.
To clean the binocular lenses, first blow off the lens with a blower
bulb or gently wipe the lens with a lens cleaning brush to remove
the larger particles. Put a few drops of lens cleaning fluid on a
fresh piece of lens cleaning tissue (never on the lens) and gen-
tly wipe the lens. Quickly wipe the excess fluid with a new, dry
piece of lens cleaning tissue. For larger lenses, clean only a small
area at a time, using a new tissue each time. On excessively dirty
lenses, wipe across the lens using one stroke for each tissue,
alternating wet and dry. Always avoid excessive pressure or rub-
bing when wiping, as wiping too hard can scratch the lens.
Storage and Cold Weather
Orion Astro-Binoculars come with a soft case for storage and
transport. We recommend always keeping the binoculars in their
case with the cover caps on when not in use.
All optics, when exposed to excessive temperature changes or
high humidity, have the potential to fog up. Always allow the optics
to slowly adjust to cold weather by storing the instrument (in its
case) in a cold area such as an unheated garage or the trunk of a
car for a few hours before use. When bringing the instrument back
inside a warm house, store it in a cool area for one to two hours.
It is very important to open up the case, remove the binoculars
from the case, remove the cover caps, and let everything dry out
overnight. The binoculars should be stored in a cool, dry place to
prevent mold growth, which can damage the optics. This is not
covered by the warranty.
Specifications
#51463 15x70 Astro-Binoculars
Magnification 15x
Objective lens aperture
70mm
Focusing
Center Focus
Eye relief
18mm
Field of View
4.4°
Close Focus
30 ft
Prisms
BAK-4, Porro
Anti-reflection coatings
Fully Multi-coated
Eyeguards
Fold-down, rubber
Weight
4 lbs.
Tripod compatibility
Fits standard photo tripods via
included L-Bracket
#52179 20x70 Astro-Binoculars
Magnification 20x
Objective lens aperture
70mm
Focusing
Center Focus
Eye relief
17mm
Field of View
3.2°
Close Focus
45 ft
Prisms
BAK-4, Porro
Anti-reflection coatings
Fully Multi-coated
Eyeguards
Fold-down, rubber
Weight
4 lbs.
Tripod compatibility
Fits standard photo tripods via
included L-Bracket
#51464 20x80 Astro-Binoculars
Magnification 20x
Objective lens aperture
80mm
Focusing
Center Focus
Eye relief
17mm
Field of View
3.2°
Close Focus
60 ft
Prisms
BAK-4, Porro
Anti-reflection coatings
Fully Multi-coated
Eyeguards
Fold-down, rubber
Weight
4.7 lbs.
Tripod compatibility
Fits standard photo tripods via
integrated tripod post
One-Year Limited Warranty
Orion Astro-Binoculars are warranted against defects in materials or workmanship for a period of one year from the date of purchase. This
warranty is for the benefit of the original retail purchaser only. During this warranty period Orion Telescopes & Binoculars will repair or replace,
at Orion’s option, any warranted instrument that proves to be defective, provided it is returned postage paid to: Orion Warranty Repair, 89
Hangar Way, Watsonville, CA 95076. If the product is not registered, proof of purchase (such as a copy of the original invoice) is required.
This warranty does not apply if, in Orion’s judgment, the instrument has been abused, mishandled, or modified, nor does it apply to normal
wear and tear. This warranty gives you specific legal rights, and you may also have other rights, which vary from state to state. For further
warranty service information, contact: Customer Service Department, Orion Telescopes & Binoculars, 89 Hangar Way, Watsonville, CA 95076;
(800)-676-1343.
Orion Telescopes & Binoculars
OrionTelescopes.com
89 Hangar Way, Watsonville, CA 95076
Customer Support Help Line (800) 676-1343
© 2011 Orion Telescopes & Binoculars
