User manual ORION TELESCOPES & BINOCULARS 09030

[. . . ] INSTRUCTION MANUAL Orion Observer 60mm EQ ® TM #9030 Equatorial Refracting 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. Box 1815, Santa Cruz, CA 95061 IN 107 0998 Objective lens Optical tube Tube cradle Finder scope Dew cap Declination lock knob Right ascension slow-motion control Declination (Dec. ) setting circle Equatorial mount Right ascension lock knob (not shown) Counterweight Counterweight shaft Retaining washer and screw Counterweight lock knob Right ascension (R. A. ) setting circle Azimuth lock knob Finder scope alignment screws Finder scope bracket Eyepiece Star diagonal Focuser drawtube Focus knob Declination slow-motion control Latitude adjustment knob and scale (not shown) Tripod leg bolt Accessory tray bracket Accessory tray Tripod leg Leg lock knob Rubber foot Figure 1. Observer 60 EQ Parts Diagram 2 Congratulations on your purchase of a quality Orion telescope. Your new Observer 60 EQ Refractor is designed for high-resolution viewing of astronomical objects. [. . . ] Aiming the Telescope To view an object in the main telescope, first loosen both the R. A. Aim the telescope at the object you wish to observe by "eyeballing" along the length of the telescope tube (or use the setting circles to "dial in" the object's coordinates). Then look through the (aligned) finder scope and move the telescope tube until the object is centered on the crosshairs. Then center the object on the finder's crosshairs using the R. A. The object should now be visible in the main telescope with a low-power (long focal length) eyepiece. Focusing the Telescope Practice focusing the telescope in the daytime before using it for the first time at night. Start by positioning the focuser near the center of its adjustment range. Insert an eyepiece into the focuser and secure with the thumbscrew. ­5° 27' That's 5 hours and 35. 4 minutes in right ascension, and ­5 degrees (5 degrees south of the celestial equator) and 27 minutes in declination. Before you can use the setting circles to locate objects, they must first be calibrated. The declination setting circle was calibrated at the factory, and should read 90° when the telescope optical tube is pointing exactly along the polar axis. If it does not read 90°, it may have to be reset. Calibrating the Right Ascension Setting Circle 1. Identify a bright star near the celestial equator and look up its coordinates in a star atlas. lock knobs on the equatorial mount (not the azimuth lock knob or latitude adjustment knob), so the telescope optical tube can move freely. Point the telescope at the bright star near the celestial equator whose coordinates you know. Center the star in the telescope's field of view. setting circle so the pointer indicates the R. A. listed for that object in the star atlas. 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 knob and rotate the telescope until the Dec. value from the star atlas matches the reading on the Dec. [. . . ] Avoid touching optical surfaces with your fingers, as skin oil may etch optical coatings. To remove fingerprints or smudges from a lens, use photographic-type lens cleaning fluid and lint-free optical lens cleaning tissue. Don't use household cleaners or eyeglasstype cleaning cloth or wipes, as they often contain undesirable additives like silicone, which don't work well on precision optics. Place a few drops of fluid on the tissue (not directly on the lens), wipe gently, then remove the fluid with a dry tissue or two. [. . . ]