User manual ORION TELESCOPES & BINOCULARS 09028

[. . . ] INSTRUCTION MANUAL Orion Observer 60mm EQ ® TM #9028 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 122 Rev. A 0799 Objective lens (hidden) Dew shield Optical tube Finder scope Finder scope bracket Finder scope alignment screws (3) Focuser drawtube Eyepiece Star diagonal Focus knob Declination slowmotion control Right ascension setting circle Latitude scale Latitude adjustment T-bolt Azimuth lock knob Tripod leg attachment bolt Tripod leg Accessary tray bracket Accessory tray Declination lock thumbscrew Declination setting circle Right ascension lock thumbscrew R. A. slow-motion control Counterweight shaft Counterweight Counterweight lock knob Retaining washer and screw Latitude lock T-bolt Spike foot Figure 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. lock knob and rotate the telescope until the R. A. 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 your finder scope's field of view, but they'll get you close, assuming the equatorial mount is accurately polaraligned. setting circle must be recalibrated every time you wish to locate a new object. Do so by calibrating the setting circle for the centered object before moving on to the next one. If at all possible, escape the light-polluted city sky and head for darker country skies. You'll be amazed at how many more stars and deep-sky objects are visible in a dark sky!Cooling the Telescope All optical instruments need time to reach "thermal equilibrium. " The bigger the instrument and the larger the temperature change, the more time is needed. Allow at least a half-hour for your telescope to cool to the temperature outdoors. In very cold climates (below freezing), it is essential to store the telescope as cold as possible. If it has to adjust to more than a 40° temperature change, allow at least one hour. 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. [. . . ] Cleaning the Optics A small amount of dust or a few specks on the glass objective (main) lens will not affect the performance of the telescope. If dust builds up, however, simply blow it off with a blower bulb, or lightly brush it off with a soft camel-hair brush. 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. [. . . ]