User manual ORION TELESCOPES & BINOCULARS REVA SVP80MMED

[. . . ] INSTRUCTION MANUAL Orion SkyView Pro 80mm ED EQ ® TM Equatorial Apochromatic Refractor Telescope #9884 Customer Support (800) 676-1343 E-mail: support@telescope. com Corporate Offices (831) 763-7000 Providing Exceptional Consumer Optical Products Since 1975 P. O. Box 1815, Santa Cruz, CA 95061 IN 223 Rev. A 12/03 Finder scope Finder scope bracket 1/4"-20 Mounting block Tube ring Tube ring Tube ring mounting plate Eyepiece Declination slow-motion control knob Declination lock knob 1. 25" Adapter Right ascension lock knob Right ascension slow2" Star diagonal Focus knob motion control knob Counterweight shaft Counterweight Latitude adjustment L-bolts Counterweight lock knob "Toe saver" Tripod support tray Figure 1. The SkyView Pro 80mm ED EQ 2 Congratulations on your purchase of a quality Orion telescope. Your new SkyView Pro 80mm ED EQ is an exceptional instrument for observing and imaging astronomical objects. [. . . ] Identify a bright star in the sky near the celestial equator (declination = 0°) and look up its coordinates in a star atlas. lock levers on the equatorial mount, so the telescope optical tube can move freely. Point the telescope at the bright star whose coordinates you know. Center the star in the telescope's field of view. setting circle thumb screws (see Figure 13); this will allow the setting circle to rotate freely. Rotate the setting circle until the R. A. coordinate listed in the star atlas for the object. Retighten the setting circle thumb screw. Finding Objects With the Setting Circles Now that both setting circles are calibrated, look up in a star atlas the coordinates of an object you wish to view. lock lever and rotate the telescope until the declination value from the star atlas matches the reading on the Dec. setting circle are positive when the telescope is pointing north of the celestial equator (Dec. = 0°), and negative when the telescope is pointing south of the celestial equator. lock lever and rotate the telescope until the right ascension value from the star atlas matches the reading on the R. A. Remember to use the lower set of numbers on the R. A. Most setting circles are not accurate enough to put an object dead-center in the telescope's eyepiece, but they should place the object somewhere within the field of view of the finder scope, assuming the equatorial mount is accurately polar aligned. Use the slow-motion controls to center the object in the finder scope, and it should appear in the telescope's field of view. The setting circles must be re-calibrated every time you wish to locate a new object. Do so by calibrating the setting circles for the centered object before moving on to the next one. Beginners occasionally experience some confusion about how to point the telescope overhead or in other directions. In Figure 1 the telescope is pointed north as it would be during polar alignment. The counterweight shaft is oriented downward. But it will not look like that when the telescope is pointed in other directions. [. . . ] 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 dust cover on the front of the telescope when not in use. Your SkyView Pro 80mm ED EQ requires very little mechanical maintenance. [. . . ]