Using Your Telescope - Orion XT4.5 Instruction Manual

a.
b.
Figure 7: (a) To attach the spring to the base, grip the pull
loop with your index finger and pull down on the spring. (b)
While pulling down, slip the end ring of the spring over the
screw head and onto the narrow part of the nylon spacer,
then release the pull loop.
To place the finder scope in the finder scope bracket, first
unthread the two black nylon screws until the screw ends are
flush with the inside diameter of the bracket. Place the O-ring
that comes on the base of the bracket over the body of the
finder scope until it seats into the groove on the middle of the
finder scope. Slide the eyepiece end (narrow end) of the find-
er scope into the end of the bracket's cylinder that does not
have the alignment screws while pulling the chrome, spring-
loaded tensioner on the bracket with your fingers (see Figure
8b). Push the finder scope through the bracket until the O-
ring seats just inside the front opening of the bracket's
cylinder. Now, release the tensioner and tighten the two black
nylon screws a couple of turns each to secure the finder
scope in place. The tips of the tensioner and nylon screws
should seat into the wide groove on the rear of the finder
scope's body.
Slide the base of the finder scope bracket into the dovetail
holder on the top of the focuser. Lock the bracket into posi-
6
tion by tightening the knurled thumbscrew on the dovetail
holder.
Inserting an Eyepiece
The final step in the assembly process is to insert an eye-
piece into the telescope's focuser. Take the cover cap off the
end of the focuser drawtube. Loosen the thumbscrews on the
focuser drawtube and insert one of the eyepieces. Secure it
in place by re-tightening the thumbscrews.
The assembly of your SkyQuest Dobsonian is now complete.
It should appear as shown in Figure 1. The dust cap on the
front of the telescope tube should always remain in place
when the telescope is not in use. It is also a good idea to
Focus lock ring Alignment
thumb screw
Figure 8a: The 6x26 correct-image finder scope and
bracket.
Figure 8b: Inserting the finder scope into the finder
scope bracket
store eyepieces in an eyepiece case and to replace the cover
caps on the focuser drawtube and on both ends of the finder
scope when the telescope is idle.

3. Using Your Telescope

It is best to get a feel for the basic functions of the SkyQuest
Tensioner