User manual ORION TELESCOPES & BINOCULARS 09402

[. . . ] INSTRUCTION MANUAL Orion SkyView Deluxe 4. 5" EQ ® TM #9402 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. Box 1815, Santa Cruz, CA 95061 IN 091 Rev. B 0199 Finder scope Finder scope alignment screws (6) Finder scope bracket Secondary mirror and three-vane spider Eyepiece Focus knob Tube ring mounting bolt Declination slow-motion control Declination setting circle Declination lock lever (not pictured) Latitude lock lever (not pictured) Counterweight shaft Counterweight Counterweight lock knob Retaining washer and knob Azimuth adjustment knobs (2) Right ascension slow-motion control Latitude adjustment knob Latitude Scale Tripod leg attachment bolt Accessory tray bracket Accessory tray Tripod leg Leg lock bolt Focuser Tube rings Tube ring clamps Primary mirror cell Collimation screws (3) (not shown) Right ascension lock lever Right ascension setting circle Polar axis finder scope Rubber foot Figure 1. SkyView Deluxe 4. 5" EQ Parts Diagram 2 Congratulations on your purchase of a quality Orion telescope. [. . . ] Again, you have to rotate the scope in R. A. so the counterweight shaft is positioned horizontally. so it points to where you want it near the horizon. To point the telescope to the east or west, or in other directions, you rotate the telescope on its R. A. Depending on the altitude of the object you want to observe, the counterweight shaft will be oriented somewhere between vertical and horizontal. The key things to remember when pointing the telescope is that a) you only move it in R. A. and Dec. , not in azimuth or latitude (altitude), and b) the counterweight and shaft will not always appear as it does in Figure 1. Collimating the Optics (Aligning the Mirrors) Collimation is the process of adjusting the mirrors so they are perfectly aligned with each other. Your telescope's optics were aligned at the factory, and should not need much adjustment unless the telescope was roughly handled during shipment. Accurate alignment is important to insuring the peak performance of your telescope, so it should be checked occasionally. Collimation is easy to do and should be done in daylight. To check the collimation, remove the eyepiece and look down the focuser drawtube. You should see the secondary mirror centered in the drawtube, the reflection of the primary mirror centered in the secondary mirror, and the reflection of the secondary mirror (and your eye) centered in the reflection of the primary mirror, as in Figure 4D. If anything is off-center, follow the collimation procedure below. It helps to put a piece of white paper on the inside of the optical tube opposite the focuser. The white paper forms a bright background behind the secondary mirror, making it easier to distinguish the mirror holder from the background. Use a Collimation Tool To aid in centering your line of sight down the focuser drawtube, and in centering the mirror reflections during collimation, it is very helpful to use a precision collimating tool containing crosshairs, such as the Orion Collimating Eyepiece #3640. Aligning the Secondary Mirror With eyepiece removed, look straight down the open focuser drawtube at the secondary (diagonal) mirror. It should be centered in the field of view. (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 spider several turns. Now hold the secondary mirror holder stationary (be careful not to touch the secondary mirror!), while turning the central Allen-head bolt. Turning the bolt clockwise will move the secondary mirror toward the front opening of the optical tube, while turning the bolt counter-clockwise will move 7 the secondary mirror toward the primary mirror. [. . . ] Fill a clean sink, free of abrasive cleanser, with room-temperature water, a few drops of liquid dishwashing detergent, and if possible, a cap-full of rubbing alcohol. Submerge the mirror (aluminized face up) in the water and let it soak for several minutes (or hours if it's a very dirty mirror). Wipe the mirror under water with clean cotton balls, using extremely light pressure and stroking in straight lines across the surface. Use one ball for each wipe across the mirror. [. . . ]