ORION TELESCOPES & BINOCULARS 8974 XT8 PLUS Instruction Manual Download

Page: 1 / 16

Orion SkyQuest

™

XT PLUS

Dobsonians

#8985 XT6 PLUS, #8974 XT8 PLUS, #8987 XT10 PLUS

IN 493 Rev. D 10/17

INSTRUCTION MANUAL

Customer Support:

www.OrionTelescopes.com/contactus

Corporate Offices:

89 Hangar Way, Watsonville CA 95076 - USA

Providing Exceptional Consumer Optical Products Since 1975

without the prior written consent of Orion Telescopes & Binoculars.

#8974

Summary of Contents for 8974 XT8 PLUS

Page 1: ...tus Corporate Offices 89 Hangar Way Watsonville CA 95076 USA Providing Exceptional Consumer Optical Products Since 1975 Copyright 2013 2014 Orion Telescopes Binoculars All Rights Reserved No part of t...

Page 2: ...anel Front panel Handle Dobsonian base Top groundplate Bottom groundplate 28mm DeepView eyepiece 2 XT8 and XT10 2 Extension adapter XT8 and XT10 10mm Sirius Pl ssl eyepiece 1 25 25mm Sirius Pl ssl eye...

Page 3: ...diately call Orion Customer Support 800 676 1343 for assistance Parts List Box 1 Optical Tube Assembly and Accessories Qty Description 1 Optical tube assembly 1 Dust cover 1 10mm Sirius Pl ssl eyepiec...

Page 4: ...panel from the outside and thread the bearing cylinder onto it You can tighten the cylinder by hand or if needed with the supplied 4mm hex key Repeat for the remaining three bearing cylinders 4 Attach...

Page 5: ...The latter bushing R is longer than the width of the side panel by 1 4 or so that s by design 13 To install the eyepiece rack S find the two pilot holes on the left side panel and screw one of the woo...

Page 6: ...e knob to thread the bolt into the threaded insert of the tube assembly s right side bearing Thread the bolt until it stops and the knob is lightly tightened 3 On the other altitude axis coupling knob...

Page 7: ...cal objects at night This way you will not have to fum ble around trying to orient yourself in the dark Find a spot outdoors where you have plenty of room to move around the telescope and where you ha...

Page 8: ...ows one to make very tiny focusing increments for ultra precise focusing To focus insert an eyepiece into the focuser and secure it with the thumbscrew s Now slowly rotate one of the coarse focus knob...

Page 9: ...power knob see Figure 11 clockwise until you hear the click indicating that power has been turned on Look through the back of the reflex sight with both eyes open to see the red dot Position your eye...

Page 10: ...through On nights of good seeing the atmosphere will be still and will yield the least amount of dis tortion On nights of poor seeing the atmosphere will be turbu lent which means different densities...

Page 11: ...that permits daytime viewing of our nearest star the Sun Figure 20 The white light filter uses high quality Baader Astro Solar safety film which reduces the transmission of the Sun s radiation to a sa...

Page 12: ...lescope ready for collimation with the tube oriented horizontally the collimation cap in place on the focuser and a piece of white paper placed inside the tube opposite the focuser Figure 23 Collimati...

Page 13: ...secondary mirror and the reflection of the secondary mirror and your eye centered in the reflection of the primary mirror as in Figure 23a If anything is off center as in Figure 23b proceed with the...

Page 14: ...primary You can tell this easily with the collimation cap and mirror center mark by simply watching to see if the dot of the collimation cap is moving closer or farther away from the ring on the cent...

Page 15: ...t Focal Ratio f 5 9 Focuser 2 Crayford dual speed 11 1 accepts 2 eyepieces and 1 25 eyepieces with included adapter Optical tube material Rolled steel Eyepieces 10mm Sirius Pl ssl 1 25 barrel dia 28mm...

Page 16: ...trument has been abused mishandled or modified nor does it apply to normal wear and tear This warranty gives you specific legal rights It is not intended to remove or restrict your other legal rights...