Orion XT12 instruction manual Installing the Finder Scope, Inserting an Eyepiece

now be known as the retaining knob. Push the shaft of the retaining knob through the hole in the side panel opposite the one the retaining knob is in (Figure 18). Thread the knob into the altitude bearing as far as it will go. There will be a gap of about 1/2" between the side panel and the altitude bearing; this is where the altitude encoder of the IntelliScope object locator will go.

loaded tensioner on the bracket with your fingers (Figure 19b). Push the finder scope through the bracket until the O- ring seats just inside the front opening of the bracket. Now, release the tensioner and tighten the two black nylon screws a couple of turns each to secure the finder scope in place. Insert the base of the finder scope bracket into the dovetail holder located adjacent to the telescope's focuser. Lock the bracket into position by tightening the knurled thumbscrew on the dovetail holder.

O-ring

Figure 18. The retaining knob with the nylon spacer is installed on the side of the base that does not have the IntelliScope port.

The CorrecTension system is now installed. If you wish to remove the optical tube from the base, you will first need to unthread and remove both the knobs.

Installing the Finder Scope

SkyQuest IntelliScope Dobsonians come with a high-qual- ity, large-aperture 9x50 achromatic crosshair finder scope (Figure 19a) as standard equipment. This greatly aids in find- ing objects to view in the night sky.

To place the finder scope in the finder scope bracket, first unthread the two black nylon screws until the ends are flush with the inside of the bracket. Place the rubber O-ring that comes on the base of the bracket over the body of the finder scope until it seats into the slot on the middle of the finder scope. Slide the eyepiece end (narrow end) of the finder scope into the bracket as shown while pulling the chrome, spring-

Finder scope	Finder scope bracket
	Nylon
	alignment
	thumbscrew (2)

	Eyepiece
Focus lock ring	Tensioner
Figure 19a. The 9x50 finder scope and bracket.

Figure 19b. Pull back on the tensioner and slide the finder scope
into its bracket until the O-ring is seated in the bracket’s ring.
1.25"	2" eyepiece adapter
eyepiece
adapter

	Focus lock
	thumbscrew
Focus	Collimation
knobs
	screw pair (3)
Figure 20. The 2” focuser of the SkyQuest XT12 IntelliScope.

Inserting an Eyepiece

The final step in the assembly process is to insert an eye- piece into the telescope’s focuser. First, take the cover cap off the focuser drawtube.

Loosen the thumbscrew on the 1.25" eyepiece adapter (Figure 20). Do not loosen the two thumbscrews on the 2" eyepiece adapter. Insert the supplied 25mm Sirius Plössl eye- piece, and secure it by retightening the thumbscrew on the

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