
IN 256 Rev. A 08/05Providing Exceptional Consumer Optical Products Since 1975Customer Support (800) 676-1343E-mail: [email protected] Off
10screws will be needed until the object comes into the finder scope’s field of view.The SkyQuest XT12’s finder scope uses a spring-loaded bracket
11expect the user to compensate for heavier accessories by adding weight to the opposite end of the telescope tube. Such counterweighting systems can
12has a hole in the center and a silver bottom. This helps center your eye so that collimation is easy to perform. Figures 19b through 19e assume you
13Now, try tightening or loosening one of the larger collima-tion thumbscrews with your fingers (Figure 23). Look into the focuser and see if the s
143000 feet. Altitude helps because it decreases the amount of distortion causing atmosphere you are looking through. A good way to judge if the seein
15bright objects, like planets and double stars. The Moon also takes higher magnifications well.Deep-sky objects, however, typically look better at me
16of the stars and locate many pretty double and multiple stars. The famous “Double-Double” in the constellation Lyra and the gorgeous two-color doubl
17possible to take pictures of bright objects. Certain photo-graphic aids, such as the Orion SteadyPix, can help in taking photos by the afocal
18
2Figure 1. The SkyQuest XT12 Classic Dobsonian.Right side panel Secondary mirror holder with 4-vane spider (not visible)Navigation knobFront braceHand
20One-Year Limited WarrantyThis Orion SkyQuest XT12 Classic Dobsonian Reflecting Telescope is warranted against defects in materials or workman-ship f
3Table of Contents 1. Unpacking ...3 2. Assembly ...4 3
4Box #3: Primary Mirror and CellQty. Description 1 Primary mirror 1 Mirror cell 3 Collimation knobs 3 Nylon washers 3 Springs2. AssemblyNow
5of engagement on the shafts. The mirror cell is now ready to be installed into the tube.Assembling the SkyQuest XT12 mirror cell to the tube can be a
6tighten them until firm, but be careful not to strip the holes by over-tightening. If you use an electric screwdriver, do final tightening with a sta
7panel of the base you will notice two predrilled starter holes, about 6" apart. Take the black wood screws and thread them into the starter hole
8should seat onto the narrow end of the spacer. Repeat this procedure for the other altitude side bearing. 3. Attach a pull loop to the free end of e
9level, but it should be placed on somewhat flat ground or pave-ment to ensure smooth movement of the telescope. Remember, never point the telescope a
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