Orion 9966 Table of Contents, Unpacking, Parts List, Collimation Aligning the Mirrors

Welcome to an exciting new world of adventure! Your SkyQuest XT12 Dobsonian is a high-quality opti- cal instrument designed to bring you dazzling views of the outer reaches of our universe. With special new innovations, such as the CorrecTension (XT) Friction Optimization system, large format focuser, and deluxe accessory package, this telescope represents a giant leap forward in the evolution of the Dobsonian. Whether you are brand-new to amateur astronomy or a seasoned stargazer, the SkyQuest XT12 Dobsonian will provide many evenings of enjoyment and fascination.

Table of Contents
1.	Unpacking	3
2.	Assembly	4
3.	Using Your Telescope	8
4.	Collimation (Aligning the Mirrors)	11
5.	Astronomical Observing	13
6.	Care and maintenance	17
7.	Specifications	17

1. Unpacking

The telescope will arrive in three boxes, one containing the optical tube assembly and accessories, another containing the unassembled Dobsonian base, and the last containing the primary mirror in its cell. Be careful unpacking the boxes. We recommend keeping the original shipping 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 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 any- thing appears to be missing or broken, immediately call Orion Customer Support (800-676-1343) or email sales@telescope. com for assistance.

Parts List

Box #1: Optical Tube Assembly and Accessories

Qty. Description

1Optical tube assembly

1Dust cover

WARNING: Never look directly at the Sun through your telescope or its finder scope—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.

125mm Sirius Plössl eyepiece

110mm Sirius Plössl eyepiece

19x50 finder scope

1Finder scope bracket with O-ring

14-hole eyepiece rack

1Collimation cap

2Eyepiece rack mounting wood screws (length 3/4")

2Spring coils

2Pull loops

4Nylon spacers (black)

2 1/4" washers (black)

2 Phillips-head screws (black, length 1-3/4")

2 Screws with round knobs attached

Box #2: Dobsonian Base

Qty. Description

1Left panel

1Right panel

1Front brace

1Top baseplate

1Ground baseplate

12Base assembly screws (length 2")

1 Hex key (4mm)

3 Plastic feet

3 Feet attachment wood screws (length 1")

1 Self-adhesive rubber bumper

1 Large hex-head screw (length 3")

2 3/8" washers

1 3/8" lock nut

1 Nylon spacer (white)

1T-nut

1Handle

2Socket head cap screws, 5/16" (black)

25/16" washers (black)

25/16" nuts (black)

1Hex key (6mm)

3