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5

lock nut will make the base difficult to rotate in the 
azimuthal (horizontal) direction.

11.  To attach the handle (N) to the front brace, first place a 

washer (O) onto each of the two 32mm hex-head bolts 
(P). Then insert the bolts through the holes in the front 
panel (from the inside surface) and into the threaded 
holes in the handle

. Tighten the bolts with a crescent 

wrench.

12.  In the hole near the top of the left side panel (D-Left) 

insert the shortest (17mm) of the three black plastic 
bushings (Q). In the hole near the top of the right side 
panel (D-Right) insert the middle-sized (25mm or 29mm) 
of the three black plastic bushings (R). 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 ½" 
wood screws into each hole until the screw heads are 
about 1/8" from the panel’s surface. Then “keyhole” the 
eyepiece rack onto the wood screws and tighten the 
screws to secure the rack in place 

(Figure 7).

Figure 4. 

Three plastic bushings used in the assembly of 

the XT PLUS.

Figure 7. 

Place the eyepiece rack’s “keyholes” over the 

mounting screws, then press the rack downward and tighten 

the screws. (XT8 PLUS rack shown)

Figure 6. 

Use the two included open-end wrenches 

as shown to attach the bottom groundplate to the top 

groundplate.

Figure 5. 

Assembly of the groundplates.

17mm

25mm or 29mm

33.75mm

Low-

friction 

washer

33.75mm 

bushing

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...

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