Left side panel

Secondary mirror holder with 4-vane spider (not visible)

Navigation knob

Right side panel

Front brace

Finder scope

Finder scope bracket Eyepiece

Focuser

Optical Tube

Altitude side bearing

CorrecTension (XT)

Friction Optimization

System

Eyepiece rack

Handle	Primary mirror cell
Handle
	Left side panel
Top baseplate
Ground baseplate	Foot (3)
Ground baseplate
	Figure 1. The SkyQuest XT12 Classic Dobsonian.

Image 2

Contents

Orion SkyQuest XT12 Classic #9966 Dobsonian Reflecting Telescope Left side panel Unpacking Table of ContentsParts List Box #3 Primary Mirror and Cell AssemblyAssembly of the Optical Tube Assembly of the Dobsonian base Locate the area of tube that is bulging out Tighten the six side screws installed earlier Installing the Eyepiece Rack Installing the CorrecTension XT Friction Optimization System Placing the Optical Tube on the Dobsonian Base Inserting an Eyepiece Using Your TelescopeInstalling the Finder Scope Viewing with Eyeglasses Focusing the TelescopeAltitude and Azimuth Aligning the Finder Scope Magnification Focusing the Finder ScopeAiming/Pointing the Telescope 1500mm 25mm Collimation Cap and Mirror Center Mark Collimation Aligning The MirrorsTransporting the Telescope Adjusting the Primary Mirror Aligning the Secondary Mirror Site Selection Star-Testing the TelescopeAstronomical Observing Seeing and Transparency Tracking Celestial Objects Cooling the TelescopeLet Your Eyes Dark-Adapt Eyepiece Selection Moon Use of 2 EyepiecesAstronomical Objects Sun How to Find Deep-sky Objects Starhopping Deep-Sky Objects Cleaning Lenses Care and MaintenanceSpecifications Cleaning MirrorsPage Page One-Year Limited Warranty

Figure 1. The SkyQuest XT12 Classic Dobsonian.