3
Table of Contents
1. Unpacking . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Parts List . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Assembly . . . . . . . . . . . . . . . . . . . . . . . . 3
4. Getting Started . . . . . . . . . . . . . . . . . . . . 5
5. Setting Up and Using the
Equatorial Mount . . . . . . . . . . . . . . . . . . . 7
6. Collimating the Optics
(Aligning the Mirrors) . . . . . . . . . . . . . . . . 9
7. Astronomical Observing . . . . . . . . . . . . 11
8. Care and Maintenance . . . . . . . . . . . . . 14
9. Specifications . . . . . . . . . . . . . . . . . . . . 14
1. Unpacking
The entire telescope system will arrive in one box. Be careful
unpacking the box. We recommend keeping the original ship-
ping containers. In the event that the telescope needs to be
shipped to another location, or returned to Orion for warranty
repair, having the proper shipping containers will help ensure
that your telescope will survive the journey intact.
Make sure all the parts in the Parts List are present. Be sure
to check boxes carefully, as some parts are small. If anything
appears to be missing or broken, immediately call Orion
Customer Support (800-676-1343) for assistance.
2. Parts List
Qty. Description
1
Optical tube assembly
1
Optical tube dust cap
2
Tube mounting rings
1
Equatorial mount
1
EZ Finder II reflex sight with mounting bracket
2
Slow-motion control cables
3
Tripod legs with attached accessory tray bracket
3
Leg lock knobs
3
Tripod attachment screws with wing nuts and
washers
1
Counterweight shaft
1
Counterweight
1
Tripod accessory tray
1
25mm Explorer II eyepiece
1
10mm Explorer II eyepiece
1
Collimation cap
3. Assembly
Assembling the telescope for the first time should take about
30 minutes. You will need a Phillips head screwdriver in addi-
tion to the tools provided. All screws should be tightened
securely to eliminate flexing and wobbling, but be careful not
to over-tighten or the threads may strip. Refer to Figures 1
and 2 during the assembly process.
During assembly (and anytime, for that matter), Do not touch
the surfaces of the telescope mirrors or the lenses of the EZ
Finder II or eyepieces with your fingers. The optical surfaces
have delicate coatings on them that can easily be damaged
if touched inappropriately. Never remove any lens assembly
from its housing for any reason, or the product warranty and
return policy will be voided.
C
ongratulations on your purchase of a quality Orion telescope. Your new ShortTube 4.5 is a terrific
starter instrument for exploring the exotic wonders of the night sky. Designed to be compact and easy
to use, this telescope will provide many hours of enjoyment for the whole family.
If you have never owned a telescope before, we would like to welcome you to amateur astronomy. Take
some time to familiarize yourself with the night sky. Learn to recognize the patterns of stars in the major
constellations. With a little practice, a little patience, and a reasonably dark sky away from city lights,
you’ll find your telescope to be a never-ending source of wonder, exploration, and relaxation.
These instructions will help you set up, properly use and care for your telescope. Please read them
over thoroughly before getting started.
WARNING:
Never look directly at the Sun
through your telescope—even for an instant—
without a professionally made solar filter that
completely covers the front of the instrument, or
permanent eye damage could result. Young
children should use this telescope only with
adult supervision.
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