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Orion
Classic Dobsonians
#8944
A N E M P L O Y E E - O W N E D C O M P A N Y
Copyright © 2022 Orion Telescopes & Binoculars. All Rights Reserved. No part of this product instruction or any of its contents
may be reproduced, copied, modified or adapted, without the prior written consent of Orion Telescopes & Binoculars.
INSTRUCTION MANUAL
SkyQuest
®
XT6 #8944, XT8 #8945
™
#8945
Corporate Offices: 89 Hangar Way, Watsonville CA 95076 - USA
Toll Free USA & Canada: (800) 447-1001
International: +1(831) 763-7000
Customer Support: support@telescope.com
XT
IN 676 06/22
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Summary of Contents for ORION TELESCOPES & BINOCULARS SkyQuest XT6 Classic
- Page 1 INSTRUCTION MANUAL Orion SkyQuest ® ™ Classic Dobsonians XT6 #8944, XT8 #8945 #8945 #8944 Corporate Offices: 89 Hangar Way, Watsonville CA 95076 - USA Toll Free USA & Canada: (800) 447-1001 International: +1(831) 763-7000 Customer Support: support@telescope.com A N E M P L O Y E E - O W N E D C O M P A N Y Copyright ©...
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Page 2: Table Of Contents
Welcome to an exciting new world of adventure! Your SkyQuest XT Classic Dobsonian is a high-quality optical instrument designed to bring you dazzling views of the outer reaches of our uni- verse. Whether you are brand-new to amateur astronomy or a seasoned stargazer, get ready for many evenings of enjoyment and fascination. - Page 3 Figure 1. A) Main base components B) Parts of the SkyQuest XT Classic Dobsonian (XT8 pictured)
- Page 4 Flange Figure 3. Invert the base assembly you’ve built so far and attach the top baseplate using assembly wood screws and the 4mm hex key. Figure 2. Attach the side panels to the front brace using six of the provided assembly wood screws and the 4mm hex key. INSET: Make sure the flange of the threaded insert on the side panels is facing inward.
- Page 5 Figure 5. Once the bolt is inserted through the groundplate and top baseplate, place the second washer on the bolt and then thread on the lock nut. Use the two 17mm crescent wrenches to lightly tighten the nut.. Next, use the two provided 17mm crescent wrenches (S) to lightly tighten the two baseplates together.
- Page 6 Spring post Philips screw Figure 7. Attach one spring post on each side panel with the included Phillips machine screw. 10. Now lift the optical tube (W) and set the altitude bearings Figure 9. Lift the tube assembly and place the side on either side of the tube in the “cradles”...
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Page 7: Using Your Telescope
Front of telescope Figure 11. Slide the red dot scope’s bracket into the dovetail base, then secure it with the thumbscrew. spring post, as shown in Figure 10. You needn’t attach both springs simultaneously; one at a time is fine. The telescope is now mounted on the base and the CorrecTension spring system is engaged. - Page 8 er from the collar. Then insert the 2" eyepiece barrel into the 2" collar all the way. Retighten the three thumbscrews. Window To focus, move the telescope so the front (open) end is point- ing in the general direction of an object at least 1/4-mile away. Now, with your fingers, slowly rotate one of the focusing knobs (see Figure 12) until the object comes into sharp focus.
- Page 9 “BATTERY” 2x per millimeter of aperture. This comes to 410x for the into the slot. SkyQuest XT8 Classic and 304x for the SkyQuest XT6 Classic. But maximum magnifications are achieved only under the Aiming/Pointing the Telescope most ideal viewing conditions at the best observing sites.
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Page 10: Astronomical Observing
“Seeing” and Transparency however, solves the finicky balance problem. The spring coils pull the tube down onto the base, thereby increasing the fric- Atmospheric conditions vary significantly from night to night. tion on the altitude bearing pads. With CorrecTension, the “Seeing”... -
Page 11: Collimation Of The Optics
With its rocky surface, the Moon is one of the easiest and most To see surface detail on Mars, you will need a high power eye- interesting objects to view with your telescope. Lunar craters, piece and very steady air! maria, and even mountain ranges can all be clearly seen from C. - Page 12 mary mirror centered in the secondary mirror, and the reflec- tion of the secondary mirror (and your eye) centered in the reflection of the primary mirror, as in Figure 16A. Got all that? Review it again carefully, and compare what you see to Figure 16A.
- Page 13 the secondary mirror. This is done by alternately loosening one of the three secondary mirror alignment screws then lightly tightening the other two (Figure 17). The goal is to center the primary mirror reflection in the secondary mirror, as in Figure 16C.
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Page 14: Care And Maintenance
eyepiece, the optics will always appear out of collimation, even fewer times you have to clean the mirrors, the better. Small though they may be perfectly aligned. It is critical to keep the specks of dust or flecks of paint have virtually no effect on the star centered, so over time you will need to make slight cor- visual performance of the telescope. -
Page 15: Specifications
6. Specifications SkyQuest XT6 Classic Focal length: 1178mm Aperture: 152mm Focal Ratio: f/7.7 Focuser: 2" Crayford, with 1.25" adapter Optical tube material: Rolled steel Mirror figure: Paraboloid Mirror coatings: 90% reflectivity, with SiO2 overcoat Minor axis of secondary mirror: 37.5mm Eyepiece: 25mm Plössl, fully multi-coated, 1.25"... - Page 16 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 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.