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Welcome to an exciting new world of adventure!
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. Before venturing into the night with your new telescope, we rec-
ommend that you read through this instruction manual.
Table of Contents
1. Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
3. Using Your Telescope . . . . . . . . . . . . . . . . . . 8
4. Astronomical Observing . . . . . . . . . . . . . . . . 11
5. Collimation of the Optics . . . . . . . . . . . . . . . 13
6. Care and Maintenance . . . . . . . . . . . . . . . . . 14
7. Specifications . . . . . . . . . . . . . . . . . . . . . . . . 15
1. Unpacking
The telescope will arrive in two boxes, one containing the
optical tube assembly and accessories, the other containing
the unassembled Dobsonian base and hardware. Be careful
unpacking the boxes. We recommend keeping the original
shipping boxes and any internal materials. In the event that the
telescope needs to be shipped to another location, or returned
to Orion for warranty repair, having the proper shipping boxes
and protective materials inside will help ensure that your tele-
scope will survive the journey intact.
Make sure all the items in the Parts List below are present. Be
sure to check boxes carefully, as some parts are small. If any-
thing appears to be missing or broken, immediately call Orion
Customer Support (800-676-1343) for assistance.
WARNING: Never look directly at the Sun with the
naked eye or with a telescope - unless you have
a proper solar filter installed over the front of the
telescope! Otherwise, permanent, irreversible eye
damage may result.
Parts List
Part Description
A
Front brace
B
Left panel
B
Right panel
C
Top baseplate (round)
D
Bottom baseplate (triangle)
E
Base assembly screw (x12)
F
Large hex-head bolt with two washers, T-nut and lock nut
2
Your SkyQuest XT Classic Dobsonian is a
G
Phillips-head machine screw (x2)
H
Spring post (x4)
I
Bolt with rosette knob (x2)
J
Spring coil (x2)
K
Handle
L
Hex nut (x2)
M
Socket-head cap screw (x2)
N
Washer (x2)
O
Pull loops
P
Hex key (6mm)
Q
Hex key (4mm)
R
Hex key (2mm)
S
14mm Crescent wrench
T
17mm Crescent wrench (x2)
U
25mm Plössl eyepiece, 1.25"
V
Red dot scope (with bracket)
W
Dust cover
X
Optical tube assembly
Y
Plastic bushing
Z
T-nut
AA
Bumper pad
BB
10mm Plossl, 1.25" (BB1), 25mm WA, 2" (BB2), 2x
Barlow (BB3)
-
Orion MoonMap 260 (not pictured)
-
Orion DeepMap 600 (not pictured)
-
Smartphone Photo Adapter (not pictured)
2. Assembly
Now that you have unpacked the boxes and familiarized your-
self with all the parts in front of you, it's time to begin assembly.
The optics of the telescope are already installed in the tube, so
most of the required assembly concerns the Dobsonian base.
Assembly of the Dobsonian Base
Refer to Figure 1A and 1B during base assembly. The base
need only be assembled once, unless you disassemble it for
long-term storage. The assembly process takes about 30 min-
utes and requires a Phillips screwdriver, the included crescent
wrenches, and the included hex keys.
Note: When tightening the base assembly screws, tighten
them until firm, but be careful not to strip the holes by over-
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