Instruction/ maintenance manual of the product XT12 Orion
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IN 227 Re v . B 03/05 Prov iding Ex ceptiona l Consum er Optic al Produ cts Sin ce 1975 Customer Support (800) 676-1343 E-mail: support@telescope.com Corporate Offices (831) 763-7000 P .
2 Figure 1. The SkyQuest XT12 IntelliScope Secondar y mirror holder with 4-v ane spider (not visible) Finder scope Finder scope brac ket Eyepiece F ocuser Optical tube T ensioning knob Primar y mirror.
3 Congratulations on your purchase of an Or ion SkyQuest XT12 IntelliScope Dobsonian . It is a high- perf or mance astronomical instrument designed to provide dazzling views of celestial objects and unprecedented ease of use.
4 1 He x ke y (size 4mm) 3 Plastic f eet 3 F eet attachment wood screws (length 1") 5 Encoder board mounting wood scre ws 1 Brass b ushing 1 Azimuth axis he x-head screw (length 2.25") 2 F ender washers (diameter 1") 1 He x lock nut 4 Altitude bearing cylinders 4 Altitude bearing cylinder screws (length 1.
5 Assembling the SkyQuest XT12 IntelliScope mirror cell to the tube can be a bit tricky . This is because the large diameter and thin aluminum of the tube will cause the tube to become somewhat out of round once the rear end ring is remov ed.
1. With a Phillips scre wdriver , screw the plastic feet into the underside of the ground baseplate (A) using the self-tap - ping wood screws pro vided.
7 There are some predrilled holes on the right side panel (oppo- site the panel that holds the encoder connector board). These holes will be used to mount par ts that come with the optional IntelliScope controller .
8 Placing the Optical T ube on the Dobsonian Base Lift the optical tube and gently place it into the Dobsonian base so that the altitude bear ings on either side of the tube rest on the bearing cylinders. Be careful when doing this, as the optical tube is somewhat hea vy and unwieldy .
9 now be known as the retaining knob . Push the shaft of the retaining knob through the hole in the side panel opposite the one the retaining knob is in (Figure 18).
10 1.25" e yepiece adapter . The other ey epiece can be placed in the ey epiece rac k until it is needed. The basic assemb ly of your SkyQuest IntelliScope Dobsonian is no w complete . It should appear as shown in Figure 1. The dust cap on the front of the telescope tube should always remain in place when the telescope is not in use.
Preparing the T elescope for Collimating Once you get the hang of collimating, you will be able to do it quickly e v en in the dark. F or now , it is best to collimate in da ylight, prefer ably in a brightly lit room and aimed at a white wall. It is recommended that the telescope tube be oriented horizontally .
12 Aligning the Primary Mirror The final adjustment is made to the primar y mirror . It will need adjustment if , as in Figure 21d, the secondar y mirror is cen - tered under the focuser and the refle.
13 4. Using Y our T elescope One of the great benefits of the SkyQuest XT IntelliScope Dobsonian is its ability to point to more than 14,000 celes - tial objects, when used with the optional IntelliScope Computerized Object Locator (controller).
14 If you hav e trouble f ocusing, rotate the focusing knob so the dr aw tub e is i n as f a r as i t will go . No w look t hrou gh the ey ep iec e whi le slo wly rota tin g the foc usi ng knob in the oppos ite dire cti on. Y ou sh oul d so on see the po int at whi ch f ocu s i s re ach ed.
15 Aiming/Pointing the T elescope With the finder scope aligned, the telescope can be quickly and accurately pointed at anything you wish to observe. The finder scope has a m uch wider field of vie w than the tele - scope’ s ey epiece, and theref ore it is much easier to find and center an object in the finder scope .
the retaining and tensioning knobs until the y are free of the base and tube (make cer tain the spacer does not f all off the retaining knob). Then, using both hands, carefully lift the tube off the base. The tube is somewhat heavy , so don’t hesitate to hav e a friend help lift the tube, if necessary .
17 your e y es become dark-adapted, more stars will glimmer into view and y ou will be ab le to see f ainter details in objects you view in your telescope . Exposing y our e yes to very bright da y - light for e xtended periods of time can adversely aff ect your night vision for days .
18 the sky , excluding the Sun and the Moon. It is so bright that sometimes it is visible to the naked eye during full daylight! Iro nica lly , V enus appe ars as a thi n cr esce nt, not a ful l d isk, when at its peak brightness. Because it is so close to the Sun, it nev er wanders too f ar from the mor ning or ev ening horizon.
19 the ID b utton. Y ou can ev en add up to 99 objects of your own choosing to the IntelliScope controller’ s database . The bac klit, two-line liquid cr ystal displa y on the controller shows you t.
20 8. Specifications Primar y mirror : 305mm diameter, Pyre x, par abolic, center- marked F ocal length: 1500mm F ocal ratio: f/4.9 F ocuser : Rack-and-pinion.
An important point after buying a device Orion XT12 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Orion XT12 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Orion XT12 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Orion XT12 you will learn all the available features of the product, as well as information on its operation. The information that you get Orion XT12 will certainly help you make a decision on the purchase.
If you already are a holder of Orion XT12, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Orion XT12.
However, one of the most important roles played by the user manual is to help in solving problems with Orion XT12. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Orion XT12 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
