Your Orion SkyView 90 will provide years of viewing pleasure for you and
your family.
Clear Skies!
9. specifications
Standard Equipment
• 6x30 Finder Scope
• Aluminum Optical Tube
• 1. 25" Rack and Pinion Focuser
• Sturdy Equatorial Mount
• Aluminum Tripod
• 25mm 1. 25" Eyepiece
• 9mm 1. 25" Eyepiece
• 1. 25 Star Diagonal
• 2 Slow-motion Cables
optical Data
• 90mm Achromatic Objective Lens
• 1000mm Focal Length
• f/11
Weights
• Total – 30 pounds
• OTA weight – 9 pounds
• Tripod weight – 21 pounds
recommended accessories
• High Power Eyepiece
• Star Chart
• Color Filters
• Moon Filter
8. care and Maintenance
care of the Mount and tube assembly
Give your telescope reasonable care and it will last a lifetime. Store it indoors or
in a dry garage. Do not leave the telescope outside except when using it. Keep it
covered with a plastic tarp or drop cloth to keep dust and dirt off. The optical
tube is aluminum and has a smooth painted surface that should resist scratches
and smudges. If a scratch does appear on the tube, it will not harm the telescope.
If you wish, white auto touch up paint will cover the scratch nicely. Smudges can
be wiped off with standard household cleaners such as Windex or 409. The gears
on the equatorial mount should not need to have grease applied to them except
after a long period of storage or if you have been observing in a particularly
dusty site. Apply a thin ribbon of grease (automotive bearing grease works best)
just where the worm gear mates to the gear wheel, then work the grease around
the worm and wheel by rotating the slow motion control cables.
care of the optics
Any quality “Optical” lens cleaning tissue and “Optical” lens cleaning fluid spe-
cifically designed for multi-coated optics can be used to clean the exposed lenses
of your eyepieces or finder scope. Never use regular glass cleaner or cleaning
fluid designed for eyeglasses. Always put the fluid on the tissue, never on the
optics. Use lots of tissue on larger lenses. Never reuse tissue. Don’t take eye-
pieces apart for cleaning!
Always remove any dirt or grit with a light wipe with a moistened tissue, and
then re-clean with another tissue. Don’t grind dirt in! Oily fingerprints and
smudges may be removed using this method. Don’t smear dirt around; remove
it gently!
cleaning the objective lens
The objective lens should not require cleaning unless it is touched and skin oils
are deposited upon the lens. Simply blowing off the dust with a blower bulb will
maintain the performance of your SkyView 90. If you need to clean the objective
lens, use the following procedure to ensure the lens will not be harmed.
Blow off the dust and dirt particles with a blower bulb; you can use a can of
compressed air provided you follow the directions very carefully. Canned air,
if held at an angle to the lens, has compounds that can get on the lens and are
very difficult to remove. Using a cleaning fluid that is safe for multi-coated
optics, put a drop or two onto a lens tissue that is also safe for multi-coated
lens (available at quality camera shops). Wipe the tissue across one-half of the
lens, and then, with a fresh tissue, dry off that half the lens. Repeat this process
using fresh tissues to clean the other half of the lens. Use a clean dry tissue to
touch up any areas as needed. The tissue may leave fibers on the lens; these
can be blown off with a blower bulb.
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