User manual ORION TELESCOPES & BINOCULARS SKYVIEWPRO 127MM EQ

[. . . ] INSTRUCTION MANUAL Orion SkyView Pro 127mm EQ TM ® #9877 Equatorial Maksutov-Cassegrain Telescope Customer Support (800) 676-1343 E-mail: support@telescope. com Corporate Offices (831) 763-7000 Providing Exceptional Consumer Optical Products Since 1975 P. O. A 11/02 Optical tube Finder scope Finder scope bracket Declination lock lever (opposite side) Right Ascension lock lever (opposite side) Declination slow-motion control knob Safety thumbscrew Mounting plate securing knob Eyepiece Star diagonal Focus knob (not shown) Counterweight shaft Counterweights Right ascension slow-motion control knob Right ascension axis rear cover Latitude scale Counterweight lock knobs Latitude adjustment L-bolts Center support shaft Tripod support tray Tripod leg Leg lock knobs Figure 1. The SkyView Pro 127mm EQ. 2 Congratulations on your purchase of an Orion telescope. Your new SkyView Pro 127mm EQ is designed for, high-resolution viewing, and astrophotography of astronomical objects. [. . . ] ­5° 27' That's 5 hours and 35. 4 minutes in right ascension, and ­5 degrees and 27 arc-minutes in declination (there are 60 arcminutes in 1 degree of declination). Before you can use the setting circles to locate objects, the mount must be accurately polar aligned, and the setting circles must be calibrated. lock lever and position the telescope as accurately as possible in declination so it is parallel to the R. A. 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. Center the star in the telescope's field of view with the slow-motion control knobs. setting circle thumbscrews; this will allow the setting circle to rotate freely. 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. 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. 10 a. b. c. d. Figure 12a-d. This illustration show the telescope pointed in the four cardinal directions (a) north, (b) south, (c) east, (d) west. Note that the tripod and mount have been moved; only the telescope tube has been moved on the R. A. 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. But it will not look like that when the telescope is pointed in other directions. Let's say you want to view an object that is directly overhead, at the zenith. [. . . ] Do not store the telescope outdoors, although storage in a garage or shed is OK. Small components like eyepieces, diagonals, and other accessories can be kept in the included carrying case or in an optional eyepiece case. Keep the dust cover on the front of the telescope and cap the rear opening of the eyepiece adapter. Also keep the finder scope caps on if you leave it attached to the optical tube. [. . . ]