for observing these usually faint celestial entities. For deep- sky observing it is important that you find an observing site well away from light pollution. Take plenty of time to let your eyes adjust to the darkness. As you become more experi- enced and your observing skills get sharper, you will be able to ferret out more and more subtle details and structure from these fascinating objects.

Beginners are often surprised to discover that the deep- sky objects they see through the eyepiece of a telescope are mostly grayish, not colorful like those you see in long- exposure photographs. The reason is that our eyes are not sensitive to color in faint light. Still, there is something very special about seeing an astronomical object in real time, with your own eyes — “live,” if not in living color.

Note About Astrophotography

SkyQuest IntelliScope Dobsonians are designed for visu- al, not photographic use. The Dobsonian mount is not an equatorial-type mount, so it cannot be motor driven for long exposure astrophotography. SkyQuests have also been opti- cally optimized for visual use, since photographic optimization degrades visual performance.

With that in mind, however, it is possible to do some simple astrophotography with a SkyQuest IntelliScope. With the use of afocal photography techniques (where the camera is simply put right up to the eyepiece to take a picture) and digital cam- eras, it is possible to take pictures of bright objects. Certain photograph aids, such as the Orion SteadyPix, can help in taking photos by the afocal method.

6.Optional IntelliScope Computerized Object Location

Perhaps the most exciting feature of the SkyQuest XT IntelliScope is its compatibility with the optional IntelliScope Computerized Object Locator (controller). When plugged into the IntelliScope port on the telescope’s base, the IntelliScope controller enables the user to point the telescope quickly and effortlessly to more than 14,000 celestial object with the push of a button. After a simple two-star alignment procedure, you just select an object to view from the intuitive keypad, then read the guide arrows on the Controller’s illuminated liquid crystal display and move the telescope in the corresponding direction. In seconds the object will be waiting in the tele- scope’s field of view, ready to observe. It’s that simple!

Even without the optional IntelliScope controller, the SkyQuest IntelliScope provides a tremendous observing experience. But addition of the controller provides a whole new level of convenience and capability, as you’re able to locate and view more objects in an evening than you ever could before.

The IntelliScope controller works by communicating elec- tronically with a pair of high-resolution, 9,216-step digital encoders, one of which will reside on one of the telescope’s side bearings (this encoder is included with the optional IntelliScope controller), the other of which you installed dur-

ing assembly of the base. The encoders allow highly precise positioning of the telescope to coordinates programmed into the IntelliScope controller’s database for each object. Since the telescope is not dependent on motors for movement, you can point the telescope at your target much more quickly (and quietly!) than other computerized telescopes can — and with- out guzzling all those batteries in the process.

The IntelliScope database includes:

7,840 objects from the Revised New General Catalog

5,386 objects from the Index Catalog

110 objects from the Messier Catalog

837 selected stars (mostly double, multiple, and variable stars)

8 planets

99 user-programmable objects

With the user-friendly IntelliScope controller, there are many ways to locate an object. If you know its catalog num- ber (NGC or Messier number, for instance), you can enter it using the illuminated keypad buttons. Or you can press one of the object-category buttons (Cluster, Nebula, Galaxy, etc.) to access a list of objects by type. For a tour of the best objects visible in a given month, you just press the Tour but- ton. Another great feature of the IntelliScope is the ability to identify an “unknown” object in the field of view — just press the ID button. You can even add up to 99 objects of your own choosing to the IntelliScope controller’s database.

The backlit, two-line liquid crystal display on the controller shows you the object’s catalog number, its common name if it has one, the constellation in which it resides, its right ascen- sion and declination coordinates, the object type, magnitude, angular size, as well as a brief description in scrolling text.

The two guide arrows and associated “navigation numbers” tell you in what direction to move the telescope to pinpoint an object’s location. As the telescope approaches the object’s location, the numbers get progressively smaller. When the navigation numbers reach 0, the telescope will be pointed right at the object! You just look into the eyepiece and enjoy the view!

The IntelliScope Computerized Object Locator is a wonderful convenience for both the novice and experienced observer. It can be added at any time to turn your SkyQuest IntelliScope into a fully computerized “smart scope” that will expand your observing horizons in ways you never imagined. It is well worth the modest investment!

7. Care and Maintenance

If you give your telescope reasonable care, it will last a lifetime. Store it in a clean, dry, dust-free place, safe from rapid chang- es in temperature and humidity. Do not store the telescope outdoors, although storage in a garage or shed is OK. Small components like eyepieces and other accessories should be kept in a protective box or storage case. Keep the cloth dust cover on the front of the telescope when not in use.

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Orion XT10, XT6, XT8 instruction manual Optional IntelliScope Computerized Object Location, Care and Maintenance