OrionメーカーXT4.5の使用説明書/サービス説明書
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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.
デバイスOrion XT4.5の購入後に（又は購入する前であっても）重要なポイントは、説明書をよく読むことです。その単純な理由はいくつかあります：
Orion XT4.5をまだ購入していないなら、この製品の基本情報を理解する良い機会です。まずは上にある説明書の最初のページをご覧ください。そこにはOrion XT4.5の技術情報の概要が記載されているはずです。デバイスがあなたのニーズを満たすかどうかは、ここで確認しましょう。Orion XT4.5の取扱説明書の次のページをよく読むことにより、製品の全機能やその取り扱いに関する情報を知ることができます。Orion XT4.5で得られた情報は、きっとあなたの購入の決断を手助けしてくれることでしょう。
Orion XT4.5を既にお持ちだが、まだ読んでいない場合は、上記の理由によりそれを行うべきです。そうすることにより機能を適切に使用しているか、又はOrion XT4.5の不適切な取り扱いによりその寿命を短くする危険を犯していないかどうかを知ることができます。
ですが、ユーザガイドが果たす重要な役割の一つは、Orion XT4.5に関する問題の解決を支援することです。そこにはほとんどの場合、トラブルシューティング、すなわちOrion XT4.5デバイスで最もよく起こりうる故障・不良とそれらの対処法についてのアドバイスを見つけることができるはずです。たとえ問題を解決できなかった場合でも、説明書にはカスタマー・サービスセンター又は最寄りのサービスセンターへの問い合わせ先等、次の対処法についての指示があるはずです。
