User manual ORION TELESCOPES & BINOCULARS 09026

[. . . ] INSTRUCTION MANUAL Orion Skywatcher 120 EQ ® TM #9026 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. B 1099 Tube rings Objective lens cell Dew cap/ lens shade Declination lock lever Right Ascension slow-motion control Latitude adjustment T-bolts Large counterweight Small counterweight Eyepiece Star diagonal Focus knob Counterweight shaft "Toe saver" retaining bolt Counterweight lock thumbscrews Azimuth fine adjustment knobs Tripod leg Declination slow-motion control Polar axis finder scope Right Ascension lock lever Finder scope Finder bracket Accessory tray bracket Accessory tray Accessory tray bracket attachment point Leg lock knob Figure 1. The SkyView 120 EQ Refractor 2 Congratulations on your purchase of a quality Orion telescope!Your new Skywatcher 120 EQ Refractor is designed for high-resolution viewing of astronomical objects. [. . . ] setting circle pointer passes the 0° indicator, the value on the Dec. 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 should 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. 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. One thing you DO NOT do is make any adjustment to the latitude adjusting T-bolts. Remember, once the mount is polar-aligned, the telescope should be moved only on the R. A. axis until the counterweight shaft is horizontal (parallel to the ground). lock lever and rotate the telescope until it is pointing straight overhead. What if you need to aim the telescope directly north, but at an object that is nearer to the horizon than Polaris?You can't do it with the counterweight down as pictured in Figure 1. To point the telescope directly south, the counterweight shaft should again be horizontal. -5° 27' That's 5 hours and 35. 4 minutes in right ascension, and -5 degrees and 27 arc-minutes in declination (the negative sign denotes south of the celestial equator). There are 60 minutes in 1 hour of R. A and there are 60 arc-minutes in 1 degree of declination. setting circle is scaled in hours, from 1 through 24, with small lines in between representing 10minute increments. The upper set of numbers apply to viewing in the Northern Hemisphere, while the numbers below them apply to viewing in the Southern Hemisphere. Before you can use the setting circles to locate objects, the mount must be accurately polar aligned, and the setting circles must 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. Identify a bright star near the celestial equator and look up its coordinates in a star atlas. [. . . ] Do not 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. Do not "polish" or rub hard when cleaning the lens, as this will scratch it. The tissue may leave fibers on the lens, but this is not a problem; they can be blown off with a blower bulb. [. . . ]