Instruction/ maintenance manual of the product XT4.5 Orion
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IN 164 Rev .A Providing Exceptional Consumer Optical Products Since 1975 Customer Support (800) 676-1343 E-mail: support@telescope.com Corporate Offices (831) 763-7000 P .
2 W elcome to an e xciting ne w world of adventure! Y our SkyQuest XT4.5 Dobsonian is a high-quality opti- cal instrument designed to bring you dazzling views of the outer reaches of our universe. Easy enough for kids to use, and portable enough for anyone to carry , the SkyQuest XT4.
3 1. Unpacking The telescope will arrive in two boxes, one containing the optical tube assembly and accessories, the other containing the unassembled Dobsonian base. Be careful unpacking the boxes. We recommend keeping the original shipping con- tainers.
4 2. Assembly Now that you have unpacked the boxes and familiarized yourself with all the parts in front of you, it's time to begin assembly . The optics of the telescope are already installed in the tube, so most of the required assembly concerns the Dobsonian base.
5 Y ou can install the rack so that it can be removed, or you can install it so it is permanently attached. About halfway down the left side panel of the base you will notice two predrilled starter holes, about 4" apart. T ake the black wood screws that come packaged with the rack and thread them into the starter holes about three turns.
T o place the finder scope in the finder scope bracket, first unthread the two black nylon screws until the screw ends are flush with the inside diameter of the bracket. Place the O-ring that comes on the base of the bracket over the body of the finder scope until it seats into the groove on the middle of the finder scope.
XT4.5 during the day , before observing astronomical objects at night. This way you will not have to fumble around trying to orient yourself in the dark! Find a spot outdoors where you have plenty of room to move around the telescope, and where you have a clear view of some object or vista that is at least 1/4-mile away .
8 (open) end is pointing in the general direction of an object at least 1/4-mile away . Now , with your fingers, slowly rotate one of the focuser knobs until the object comes into sharp focus.
9 25mm eyepiece, you may want to increase the magnification to get a closer view . Loosen the thumbscrew on the focuser drawtube and remove the eyepiece. Insert the 10mm eye- piece in the focuser then tighten the thumbscrew . If you were careful not to bump the telescope, the object should still be centered within the field of view .
10 Cooling the T elescope All optical instruments need time to reach “ thermal equilibri- um ” to achieve maximum stability of the lenses and mirrors, which is essential for peak performance. When moved from a warm indoor location outside to cooler air (or vice-versa), a telescope needs time to cool (or warm) to the outdoor tem- perature.
11 Remember that objects appear to move acr oss the field of view faster at higher magnifications. This is because the field of view becomes narr ower . Eyepiece Selection By using eyepieces of varying focal lengths, it is possible to attain many magnifications with the SkyQuest XT4.
12 Io, Callisto, Europa, and Ganymede. Higher power eyepieces should bring out the cloud bands on the planet ’ s disk. SA TURN The ringed planet is a breathtaking sight when it is well positioned.
ly , until the telescope is centered on the new star . Continue using stars as guideposts in this way until you are the approximate position of the object you are trying to find (Figure 15). Look in the telescope ’ s eyepiece, and the object should be somewhere within the field of view .
14 Appendix A: Collimation (Aligning the Mirrors) Collimation is the process of adjust- ing the mirrors so they are perfectly aligned with one another . Y our tele- scope ’ s optics were aligned at the factory , and should not need much adjustment unless the telescope is handled roughly .
15 the secondary mirror (the smallest circle, with the collimation cap “ dot ” in the center) is off-center . Y ou will fix that in the next step. Adjusting the Primary Mirror The final adjustment is made to the primary mirror .
16 Before cleaning with fluid and tissue, blow any loose particles off the lens with a blower bulb or compressed air . Then apply some clean- ing fluid to a tissue, never directly on the optics. Wipe the lens gently in a circular motion, then remove any excess fuild with a fresh lens tissue.
An important point after buying a device Orion XT4.5 (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 XT4.5 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 XT4.5 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Orion XT4.5 you will learn all the available features of the product, as well as information on its operation. The information that you get Orion XT4.5 will certainly help you make a decision on the purchase.
If you already are a holder of Orion XT4.5, 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 XT4.5.
However, one of the most important roles played by the user manual is to help in solving problems with Orion XT4.5. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Orion XT4.5 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
