Orion Stargazer 5590 User manual

Deluxe Stargazer’s 7
Piece Filter Set
#5590
Your new Orion Stargazer’s 7-piece lter set will add versatil-
ity and viewing pleasure to your astronomy experience. This
set contains a variable polarizing lter, a SkyGlow Broadband
light-pollution lter, four color lters, and a plastic storage case.
Please read these instructions thoroughly for proper use and
care of the lters.
1. Attaching the Filters
Filters require a 1.25" telescope eyepiece that can accept thread-
ed lters. Any Orion 1.25" eyepiece will work. Simply thread the
lter into the eyepiece barrel until it is nger tight. You can “stack”
lters by threading another lter into the bottom of the rst. Use
the lters photographically by threading them into eyepieces used
in tele-extenders and universal camera adapters. Some camer-
as adapters and barlow lenses also have the proper threads to
accept lters directly.
2. SkyGlow Broadband Light-Pollution Filter
The SkyGlow Broadband lter is useful in areas of moderate light
pollution like nearby streetlights. It blocks the most common unde-
sirable light pollution, while passing other desirable wavelengths
such as Hydrogen Alpha, Hydrogen Beta, and Doubly Ionized
Oxygen. It is designed for both visual and photographic use.
The Importance of Dark Adaptation
Allowing your eyes to dark-adapt is the key to getting the most
from your SkyGlow lter. Allow your eyes to dark-adapt for about
20-30 minutes before you use the lter. Remember, the instant
you glance at a bright object like a street lamp or bright ash-
light bulb, your eyes lose their dark-adaptation. You have to wait
another 20-30 minutes for it to return. Locate your telescope away
from direct illumination by streetlights. Set up in the “shadows” of
buildings and other objects.
What You Will See
The SkyGlow lter improves the contrast between sky and object
but will not actually make the object brighter. Expect a very dark
sky background and a somewhat dimmer but higher-contrast
image. The lter performs best on emission and planetary nebu-
las like the Orion and Owl nebulas in winter, and the Lagoon and
Dumbell nebulas in summer. Try these objects for your rst uses
of the lter. The SkyGlow lter has considerably less effect on gal-
axies and stars.
3. Variable Polarizing Filter
The variable polarizing lter reduces the amount of light entering
your eyepiece from your telescope. You can dim the view when
observing a bright object, such as the Moon or a planet (transmis-
sion: 40% to 1%).The variable polarizing Filter will not change the
color of the object being viewed and will prevent eye fatigue and
loss of night vision.
IN 203 Rev B 02/09
Corporate Offices: 89 Hangar Way, Watsonville CA 95076 - USA
Toll Free USA & Canada: [phone]
International: [phone]
Customer Support: [email protected]
Copyright © 2021 Orion Telescopes & Binoculars.All Rights Reserved. No part of this product instruction or any of its contents
may be reproduced, copied, modied or adapted, without the prior written consent of Orion Telescopes & Binoculars.
AN EMPLOYEE-OWNED COMPANY

Using the Polarizing Filter
Insert the eyepiece with the lter attached into the telescope and
focus the image. If the image is too bright or too dark, then remove
the eyepiece and rotate the knurled ring on the filter a small
amount. Don’t turn it too much, as the lter goes from its maximum
light transmission to its minimum transmission in just a 1/4 turn
of the ring. Re-insert the eyepiece and check the image again.
Repeat this process until you have the level of brightness that you
want.
Terrestrial Viewing
The Variable Polarizing filter can be used during the day to
reduce sunlight glare from lakes, oceans, or window glass. Simply
unthread the lower half from the upper half of the lter and thread
either half into a 1.25" eyepiece. Once the eyepiece is returned to
the telescope and focused, rotate it in the focuser to reduce glare.
You will not be able to reduce overall brightness by using only one
lter, but you will be surprised at how much control you have over
reected light.
4. Color Eyepiece Filters
The color lters will enhance your visual and photographic obser-
vation of the Moon and planets, allowing you to see greater con-
trast between planetary details of differing colors.
How They Work
Planetary surface details and atmospheric phenomena reect sun-
light as contrasting colors which we see as details on the disc of a
planet. A color eyepiece lter absorbs a specic color of reected
light: for example, red. Absorbing red will reveal detail of a con-
trasting color, blue, in this example. This lightening of similar colors
and darkening of contrasting colors enhances the detail that you
see. Color lters do not actually increase the level of detail, they
merely make it easier to see.
Color Filter Guide
#80A Medium Blue
30% Transmission
Enhances:
• contrast of some comet tails
• lunar surface detail (signicantly)
• Martian polar caps and high clouds
• view of Venus and Mercury in orange twilight sky
• orange and purple belts and white ovals of Jupiter
• subtle shadings on Saturn
#25 Red
14% Transmission
Enhances:
• Martian surface detail in larger scopes
• contrast of Mercury against blue sky
• contrast and cloud denition of Venus
• bluish clouds of Saturn and Jupiter
• contrast of Saturn’s rings
#58 Green
24% Transmission
Enhances:
• lunar surface detail
• contrast of Red Spot on Jupiter
• contrast of subtle red and blue hues
• melt lines around polar caps on Mars
• Venusian cloud patterns
#15 Deep Yellow
67% Transmission
Enhances:
• contrast of lunar surface
• polar caps and orange desert regions on Mars
• orange and red features on Saturn and Jupiter
• low-contrast cloud detail on Venus
5.Cleaning and Maintenance of the Filters
When not in use, the lters should be kept in their protective case.
Given proper care and storage, the lters should last a lifetime.
Should a lter need cleaning for any reason, use the following
directions to clean the lter without damage.
Any quality optical lens cleaning tissue and optical lens clean-
ing uid specically designed for multi-coated optics can be used
to clean the glass surfaces of your lter. Never use regular glass
cleaner or cleaning uid designed for eyeglasses.
Before cleaning with uid and tissue, blow any loose particles off
the surface with a blower bulb or compressed air. Then apply some
cleaning uid to a tissue, never directly on the optics. Wipe the
glass gently in a circular motion, then remove any excess uid with
a fresh lens tissue. Oily ngerprints and smudges may be removed
using this method. Use caution; rubbing too hard may scratch the
glass.
Corporate Offices: 89 Hangar Way, Watsonville CA 95076 - USA
Toll Free USA & Canada: [phone]
International: [phone]
Customer Support: [email protected]
Copyright © 2021 Orion Telescopes & Binoculars.All Rights Reserved. No part of this product
instruction or any of its contents may be reproduced, copied, modied or adapted, without the
prior written consent of Orion Telescopes & Binoculars.
AN EMPLOYEE-OWNED COMPANY
One-Year Limited Warranty
This Orion product is warranted against defects in materials or workmanship for a period of one year from the date of purchase. This warranty
is for the benet 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. Proof of purchase (such as a copy of the origi-
nal receipt) is required. This warranty is only valid in the country of purchase.
This warranty does not apply if, in Orion’s judgment, the instrument has been abused, mishandled, or modied, nor does it apply to normal wear
and tear. This warranty gives you specic legal rights. It is not intended to remove or restrict your other legal rights under applicable local con-
sumer law; your state or national statutory consumer rights governing the sale of consumer goods remain fully applicable.
For further warranty information, please visit www.OrionTelescopes.com/warranty.