User manual ORION TELESCOPES & BINOCULARS 09408

[. . . ] INSTRUCTION MANUAL Orion SkyView Deluxe 8" EQ ® TM Equatorial Reflecting Telescope #9408 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 Finder scope alignment screws (6) Finder scope Finder scope bracket Secondary mirror holder Eyepiece Focuser Focus knob Declination slowmotion control Tube ring clamps Tube ring Declination setting circle Declination lock lever (not visible) Latitude lock lever (not visible) Counterweight shaft Counterweight Counterweight lock knob Retaining nut Azimuth fine adjustment knobs (2) Tube ring mount bolts Primary mirror cell Spring-loaded collimation screws (3) (not visible) Right ascension lock lever Right ascension setting circle Polar axis finder scope Right ascension slow-motion control Latitude adjustment knob Tripod leg attachment bolt Latitude scale Accessory tray bracket Accessory tray Tripod leg Leg lock bolt Figure 1. SkyView Deluxe 8" parts diagram 2 Congratulations on your purchase of a quality Orion telescope. Your new SkyView Deluxe 8" EQ is designed for high-resolution viewing of astronomical objects. [. . . ] (b) If the optics are out of alignment, the view might look something like this. (c) Here, the secondary mirror is centered under the focuser, but it needs to be adjusted (tilted) so that the entire primary mirror is visible. (d) The secondary mirror is correctly aligned, but the primary mirror still needs adjustment. When the primary mirror is correctly aligned, the eye will be centered, as in (a). 10 tions for the time being. (It helps to adjust the secondary mirror in a brightly lit room with the telescope pointed toward a bright surface, such as white paper or a wall. ) If the secondary mirror is not centered in the focuser drawtube (in the direction parallel to the length of the telescope), loosen the three small alignment screws in the center hub of the secondary mirror holder several turns. Now hold the secondary mirror stationary (be careful not to touch the surface of the secondary mirror!), while turning the central Phillipshead bolt (as in Figure 9). Turning the bolt clockwise will move the secondary mirror toward the front opening of the optical tube, while turning the bolt counterclockwise will move the secondary mirror toward the primary mirror. When the secondary mirror is centered in the focuser drawtube (as in Figure 8c), rotate the secondary mirror holder slightly sideto-side until the reflection of the primary mirror is as centered in the secondary mirror as it will get. Now tighten the three small alignment screws to secure the secondary mirror in that position. Adjust the tilt of the secondary mirror by loosening or tightening the three alignment screws with a Phillips screwdriver. The tilt of the primary mirror is adjusted with the three springloaded collimation screws on the back end of the optical tube (bottom of the primary mirror cell); these are the knurled thumbscrews with the larger diameter heads. The three smaller-headed slotted thumbscrews lock the primary mirror's position in place; these screws must be loosened before any collimation adjustments can be made to the primary mirror (Figure 11). Spring-loaded collimation thumbscrews Slotted locking thumbscrews Figure 9. 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. The three spring-loaded collimation thumbscrews adjust the tilt of the primary mirror. The three slotted thumbscrews lock the mirror's tilt in place. If the entire primary mirror reflection is not visible in the secondary mirror (as it is not in Figure 8c), adjust the tilt of the secondary mirror by alternately loosening one of the three alignment screws a turn or two and tightening the other two (Figure 10). The goal is to center the primary mirror reflection in the secondary mirror, as depicted in Figure 8d. Don't worry that the reflection of the secondary mirror (the smallest circle, with your eye reflected in it) is off-center (as also is the case in Figure 8d); you will fix that in the next step. Adjusting the Primary Mirror The final adjustment is made to the primary mirror. It will need adjustment if, as in Figure 8d, 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 your eye inside) is off-center. To start, unthread the slotted thumbscrews a few turns each with your fingers (Figure 12). If the screws are too tight to turn with your fingers, use a flat-head screwdriver. Figure 12. Before collimation adjustments can be made to the primary mirror, the three slotted thumbscrews must first be loosened. 11 Now, try tightening or loosening one of the spring-loaded collimation thumbscrews one turn (Figure 13). Look into the focuser and see if the secondary mirror reflection has moved closer to the center of the primary mirror reflection. Repeat this process on the other two collimation thumbscrews, if necessary. [. . . ] This is done by first removing the six screws on the telescope tube that connect the primary mirror cell to the tube. Next, remove the primary mirror from the mirror cell; you will need to remove the three mirror clips to do this. Completely unthread the two Phillips-head screws in each clip, and carefully lift the mirror from its cell. Be careful not to touch the front surface of the mirror with your fingers! [. . . ]