User manual CELESTRON POWERSTAR 8-PEC

[. . . ] With it you will enjoy numerous objects in the sky--planets, nebulae, star clusters, galaxies and other astronomical objects. This manual covers the 80mm equatorial model. The equatorial mount contains setting circles and slow motion cables to make it easier to locate and track astronomical objects. But, before your journey begins take time to read this manual to familiarize yourself with the operation and parts of your telescope. [. . . ] 3. The declination setting circle is factory set and should not need any adjustment if it reads accurately. The right ascension setting circle (#10) must be aligned. Choose a bright and easy to find star in a star chart and note the coordinates (right ascension and declination). Find the star in the finderscope and then in the telescope. Now, rotate the right ascension circle to match the coordinates of the star with the indicator mark. If you polar aligned the telescope accurately, the declination circle should be correctly set to the proper coordinates. You may notice that there are two sets of numbers on the right ascension dial, one for the northern hemisphere and one for the southern. Observers in the northern hemisphere should use the upper set of numbers while southern observers should use the lower set of numbers. Remember in the northern hemisphere, the right ascension should decrease as the telescope is moved towards the west. The right ascension setting circle does not move as the telescope moves in right ascension and thus it must by aligned each time you want to use it to find a new object. However, you do not need to use a bright star each time but you can use the object you are currently observing. This yields an actual field of 1°, or a full degree. To convert degrees to feet at 1, 000 yards, which is more useful for terrestrial observing, simply multiply by 52. 5. Continuing with our example, multiply the angular field 1° by 52. 5. This produces a linear field width of over 52. 5 feet at a distance of one thousand yards. The apparent field of each eyepiece that Celestron manufactures is found in the Celestron Accessory Catalog (#93685). 12 CELESTIAL OBSERVING Now that your telescope is set up, you're ready to use it for observing. This section covers visual observing for both solar system and deep-sky objects. Observing the Moon In the night sky, the moon is a prime target for your first look because it is extremely bright and easy to find. Although the beauty of the full moon may make it seem a perfect viewing object, in fact, the light reflected from its fully illuminated face can be overpowering. In addition, little or no contrast can be seen during this phase. One of the best times to observe the moon is during its partial phases, such as a crescent or quarter moon. At these times, long shadows reveal a great amount of detail on the lunar surface. At low power, with the standard eyepiece, you'll be able to see the whole lunar disk at one time. [. . . ] This turns your telescope into a high power telephoto lens perfect for terrestrial photography and short exposure lunar and filtered solar photography. A full description of all Celestron accessories can be found in the Celestron Accessory Catalog (#93685) or web site www. celestron. com 17 CELESTRON TWO YEAR WARRANTY A. Celestron warrants this telescope to be free from defects in materials and workmanship for two years. Celestron will repair or replace such product or part thereof which, upon inspection by Celestron, is found to be defective in materials or workmanship. [. . . ]