User manual ORION TELESCOPES & BINOCULARS 09027

[. . . ] INSTRUCTION MANUAL Orion SpaceProbe 130mm EQ ® Equatorial Newtonian Reflector Telescope #9027 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 thumb screws(2) Spring -loaded tensioner Finder scope bracket Piggyback adapter Tube mounting rings Dovetail slot Eyepiece Focuser Dec. slow-motion control cable Tube ring clamps Primary mirror cell Dec. lock knob Counterweight Counterweight lock knob Counterweight shaft R. A. [. . . ] 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, 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 it is very helpful to use a precision collimating tool containing crosshairs, such as the Orion Collimating Eyepiece (#3640). We highly recommend that you purchase one. Aligning the Secondary Mirror With the eyepiece removed, look straight down the open focuser drawtube at the secondary (diagonal) mirror. Ignore the reflections for the time being. The secondary mirror should be centered in the field of view. If it isn't, as in Figure 8b, it must be adjusted. (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 set screws in the center hub of the secondary mirror holder several turns. You will need a 3mm Allen wrench to do this. Now hold the secondary mirror stationary (be careful not to touch the surface of the secondary mirror!), while turning the central Phillips head screw (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 side-to-side until the reflection of the primary mirror is as centered in the secondary mirror as it will get. It still may not be perfectly centered yet, but that is OK. Now tighten the three set screws to secure the secondary mirror in that position. This adjustment will rarely need to be done, if ever. Figure 10. Adjust the tilt of the secondary mirror by loosening or tightening the three alignment setscrews with a Phillips screwdriver. 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. [. . . ] Then follow the same procedure described below for cleaning the primary mirror. The secondary mirror is glued into its holder, and should not be removed from the holder for cleaning. To clean the primary mirror, carefully remove the mirror cell from the telescope. This is done by first removing the three primary mirror collimation screws indicated in Figure 14. [. . . ]