User manual ORION TELESCOPES & BINOCULARS REV C 9408 SVD 6

[. . . ] INSTRUCTION MANUAL Orion SkyView Deluxe 6" EQ ® TM Equatorial Reflecting Telescope #9403 Customer Support (800) 676-1343 E-mail: support@telescope. com Corporate Offices (831) 763-7000 Providing Exceptional Consumer Optical Products Since 1975 P. O. C 0500 Finder scope alignment screws (6) Finder scope Finder scope bracket Secondary mirror holder Declination slowmotion control Eyepiece Focuser Focus knob Tube ring clamps Tube ring Declination setting circle Declination lock lever (not pictured) Latitude lock lever (not pictured) Counterweight shaft Counterweights Counterweight lock knobs Retaining washer and knob Azimuth adjustment knobs (2) 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 Tube ring mount bolt Primary mirror cell Accessory tray bracket Accessory tray Tripod leg Leg lock knob Rubber foot Figure 1. SkyView Deluxe 6" parts diagram 2 Congratulations on your purchase of a quality Orion telescope. Your new SkyView Deluxe 6" EQ is designed for high-resolution viewing of astronomical objects. [. . . ] Accurate collimation is important to insuring the peak performance of your telescope, so it should be checked before each observing session. Proper collimation of the 6" SkyView Deluxe's optics is especially critical due the telescope's short focal length; even slight alignment errors will cause images at b. c. a. d. Figure 8. (a) When the mirrors are properly aligned, the view down the focuser drawtube should look like this. (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 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. smaller-headed thumb screws 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 thumb screws Locking thumb screws Figure 11. The three spring-loaded collimation thumb screws adjust the tilt of the primary mirror. The three smaller thumb screws lock the mirror's tilt in place. 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. Do not touch the mirror's surface! 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. 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 thumb screws with the larger diameter heads. The three To start, unthread the three smaller thumb screws a few turns each with your fingers (Figure 12). [. . . ] If a scratch does To clean the primary mirror, carefully remove the mirror cell from the telescope. This is done by first removing the three spring-loaded collimation thumb screws from the bottom of the mirror cell. 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. [. . . ]