User manual ORION TELESCOPES & BINOCULARS SKYVIEWPRO 8EQ

[. . . ] INSTRUCTION MANUAL Orion SkyView Pro 8 EQ TM ® #9868 Equatorial Reflecting 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 08/02 Finder scope Finder scope bracket Eyepiece Declination lock lever (not shown) Right ascension lock lever (not shown) Declination slow-motion control knob Safety thumbscrew Mounting plate securing knob Counterweight shaft Counterweights Counterweight lock knobs Latitude adjustment L-bolts Center support shaft Tripod support tray Right ascension slow-motion control knob Latitude scale Tube rings Optical tube Mirror cell Tripod leg Leg lock knobs Figure 1. The SkyView Pro 8 EQ. 2 Welcome to the exciting world of amateur astronomy!Your new SkyView Pro 8 EQ is designed for highresolution viewing of astronomical objects. [. . . ] Note: The center ring sticker need not ever be removed from the primary mirror. Because it lies directly in the shadow of the secondary mirror, its presence in no way adversely affects the optical performance of the telescope or the image quality. Aligning the Secondary Mirror With the collimation cap in place, look through the hole in the cap at the secondary (diagonal) mirror. The secondary mirror itself should be centered in the focuser drawtube, in the direction parallel to the length of the telescope. It helps to adjust the secondary mirror in a brightly lit room with the telescope pointed towards a bright surface, such as white paper or wall. Also placing a piece of white paper in the telescope tube opposite the focuser (in other words, on the other side of the secondary mirror) will also be helpful in collimating the secondary mirror. Using a 2mm hex key, loosen the three small alignment set screws in the center hub of the 4vaned spider several turns. Now keep the mirror's holder stationary (be careful not to touch the surface of the mirrors), while turning the center screw with a Phillips head screwdriver (See Figure 15). Turning the screw clockwise will move the secondary mirror toward the front opening of the optical tube, while turning the screw counter-clockwise will move the secondary mirror toward the primary mirror. Note: When making these adjustments, be careful not to stress the spider vanes or they may bend. Figure 15. To center the secondary mirror under the focuser, hold the secondary mirror holder in place with one hand while adjusting the center bolt with a Phillips screwdriver. When the secondary mirror is centered in the focuser drawtube, rotate the secondary mirror holder until the reflection of the primary mirror is as centered in the secondary mirror as possible. Now tighten the three small alignment screws equally to secure the secondary mirror in that position. If the entire primary mirror reflection is not visible in the secondary mirror, as in Figure 14c, you will need to adjust the tilt of the secondary mirror. This is done by alternately loosening one of the three alignment set screws while tightening the other two, as depicted in Figure 16. The goal is to center the primary mirror reflection in the secondary mirror, as in Figure 14d. Don't worry that the reflection of the secondary mirror (the smallest circle, with the collimation cap "dot" in the center) is off-center. Adjust the tilt of the secondary mirror by loosening or tightening the three alignment set screws with a 2mm hex key. 12 Adjusting the Primary Mirror The final adjustment is made to the primary mirror. It will need adjustment if, as in Figure 14d, the secondary mirror is centered under the focuser and the reflection of the primary mirror is centered in the secondary mirror, but the small reflection of the secondary mirror (with the "dot" of the collimation cap) is off-center. The tilt of the primary mirror is adjusted with three springloaded collimation thumbscrews on the back end of the optical tube (bottom of the primary mirror cell); these are the larger thumbscrews. The other three smaller thumbscrews lock the mirror's position in place; these thumbscrews must be loosened before any collimation adjustments can be made to the primary mirror. To start, turn the smaller thumbscrews that lock the primary mirror in place a few turns each (Figure 17). [. . . ] For the SkyView Pro 8 EQ, this means you must loosen the six screws on the side of the tube near the primary mirror. You do not need to remove the collimation screws on the bottom of the mirror cell. You will notice the primary mirror is held down with three clips held by two screws each. Fill a clean sink free of abrasive cleanser, with room-temperature water, a few drops of liquid dishwashing detergent, and if possible, a capfull of rubbing alcohol. [. . . ]