orion telescopes & Binoculars
Post office Box 1815, Santa Cruz, Ca 95061
Customer Support Help Line (800) 676-1343 • Day or Evening
Keep the objective lens cap on the front of the telescope
when it is not in use.
Your Explorer telescope requires very little mechanical main-
tenance. The optical tube is aluminum and has a smooth
painted finish that is fairly scratch-resistant. If a scratch does
appear on the tube, it will not harm the telescope. If you wish,
you may apply some auto touch-up paint to the scratch.
Smudges on the tube can be wiped off with a soft cloth and a
household cleaner.
Cleaning the optics
Any quality optical lens tissue and cleaning fluid specifically
designed for multi-coated optics can be used to clean the
telescope’s objective lens as well as the lenses of the eye-
pieces and finder scope. Never use regular glass cleaner or
cleaning fluid designed for eyeglasses. Before cleaning with
fluid and tissue, blow any loose particles off the lens with a
blower bulb or compressed air, or lightly brush the lens with
a soft camel hair brush. Apply some cleaning fluid to a tis-
sue, never directly on the optics. Wipe the lens gently in a
circular motion, then remove any excess fluid with a fresh
lens tissue. Oily fingerprints and smudges may be removed
using this method. Use caution; rubbing too hard may
scratch the lens. For larger lenses, clean only a small area
at a time, using a fresh lens tissue on each area. Never
reuse tissues.
7. Specifications
#9994 Explorer 80mm Altazimuth Refractor
Optical tube: Seamless aluminum
Objective lens diameter: 80mm (3.1")
Objective lens: Achromatic doublet, air-spaced
Objective lens coating: Fully-coated with multi-coatings
Focal length: 910mm
Focal ratio: f/11.4
Eyepieces: 25mm and 10mm Explorer IIs, fully coated,
1.25" barrel diameter, threaded for filters
Magnification: 36x (with 25mm) and 91x (with 10mm)
Focuser: Rack-and-pinion, metal, accepts 1.25" diagonal
and camera T-ring
Diagonal: 45° correct-image, 1.25" barrel diameter
Finder scope: 6x magnification, 26mm effective aperture,
achromatic, crosshairs, provides image orientation the
same as the naked eye
Mount: AZ-3, altazimuth
Tripod: Aluminum, adjustable height
Total instrument weight: 15 lbs.
#9029 Explorer 90mm Altazimuth Refractor
Optical tube: Seamless aluminum
Objective lens diameter: 90mm (3.5")
Objective lens: Achromatic doublet, air-spaced
Objective lens coating: Fully coated with multi-coatings
Focal length: 910mm
Focal ratio: f/10.1
Eyepieces: 25mm and 10mm Sirius Plössls, fully coated
with multi-coatings, 1.25"-barrel diameter, threaded for
filters
Magnification: 36x (with 25mm), 91x (with 10mm)
Focuser: Rack-and-pinion, metal, accepts 1.25" diagonal
and camera T-ring
Diagonal: 45° correct-image, 1.25" barrel diameter
Finder scope: 6x magnification, 26mm effective aperture,
achromatic, crosshairs, provides image orientation the
same as the naked eye
Mount: AZ-3, altazimuth
Tripod: Aluminum, adjustable height
Total instrument weight: 16 lbs.
one-Year limited Warranty
This Orion Explorer Altazimuth Refractor is 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, P. O. Box
1815, Santa Cruz, CA 95061; (800) 676-1343.
