Manuale d’uso / di manutenzione del prodotto XT4.5 del fabbricante Orion
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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.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il Orion XT4.5 è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Orion XT4.5 - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Orion XT4.5 imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Orion XT4.5 ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Orion XT4.5, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Orion XT4.5.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Orion XT4.5. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Orion XT4.5 insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
