User manual MEADE DS-2000-LNT

[. . . ] Instruction Manual DS-2000 Series Reflecting and Refracting Telescopes AutoStar® -- LNTTM -- SmartFinderTM TM MEADE. COM Refracting Telescopes use a large objective lens as their primary light-collecting element. Meade refractors, in all models and apertures, include achromatic (2-element) objective lenses in order to reduce or virtually eliminate the false color (chromatic aberration) that results in the telescopic image when light passes through a lens. Reflecting Telescopes use a concave primary mirror to collect light and form an image. In the Newtonian type of reflector, light is reflected by a small, flat secondary mirror to the side of the main tube for observation of the image. Eyepiece F 2-Element Objective Lens Refracting Telescope In the refracting telescope, light is collected by a 2-element objective lens and brought to a focus at F. Secondary Mirror Concave Mirror F Reflecting Telescope Eyepiece In contrast, the reflecting telescope uses a concave mirror for this purpose. CONTENTS WARNING! Never use a Meade® Telescope to look at the Sun! [. . . ] Constellation is a database of all 88 Northern and Southern Hemisphere constellations. When this menu option is chosen and a constellation name appears on the first line of the screen, press GO TO once to change the second line to the name of the brightest star in the constellation. Press GO TO a second time to slew the telescope to that star. Use the Scroll keys to cycle through the list of stars in the constellation, from brightest to dimmest. Deep Sky is a database of objects outside our Solar System such as nebulae, star clusters, galaxies, and quasars. Star is a database of stars listed in different categories such as named, double, variable, or nearby. Satellite is a database of Earth-orbiting objects such as the International Space Station, the Hubble Space Telescope, Global Positioning System (GPS) satellites, and geosynchronous orbit satellites. User Objects allows the user to define and store in memory deep-sky objects of specific interest that are not currently in the Autostar database. See "Appendix B" for more information. Landmarks stores the location of terrestrial points of interest in the permanent Autostar database. IMPORTANT NOTE: To use the Landmark function, the telescope must be located and aligned exactly as when the landmark was added to the database. { Select: To select a Landmark already in the database (see ADD below), choose the "Select" option and scroll through the list. Press ENTER to select a Landmark, then press GO TO and the telescope slews to the object. Add: To add a Landmark, choose the "Add" option. Locate and center the Landmark in the eyepiece, then press ENTER. { Identify is an exciting feature for an observer who wants to scan the night sky and start exploring. After the telescope has been properly aligned, use the Autostar Arrow keys to move about in the sky. Then follow this procedure: IMPORTANT NOTE: Only use the Arrow keys to move the telescope during the Identify procedure. Do not loosen the telescope locks or move the base or alignment is lost. When a desired object is visible in the eyepiece, keep pressing MODE until the "Select Item: Object" menu is displayed. Scroll through the Object menu options until the "Object: Identify" screen appears. Autostar searches the database for the identity of the object being observed. If the telescope is not directly on an Autostar database object, the nearest database object is located and displayed on the screen. Press GO TO and the telescope slews to that object. 23 Event Menu The Event menu provides access to dates and times of astronomical events. [. . . ] Most impressive of these is the Great Nebula in Orion (M42), a diffuse nebula that appears as a faint wispy gray cloud. Open Clusters are loose groupings of young stars, all recently formed from the same diffuse nebula. The Pleiades is an open cluster 410 light years away (Fig. Constellations are large, imaginary patterns of stars believed by ancient civilizations to be the celestial equivalent of objects, animals, people, or gods. [. . . ]