instruction Manual Orion 6" Newtonian Imaging Reflector ® #9786 Providing Exceptional Consumer Optical Products Since 1975 Customer Support (800)‑676-1343 E-mail: support@telescope.com Corporate Offices (831)‑763-7000 89 Hangar Way, Watsonville, CA 95076 IN 319 Rev.
Dovetail holder Focuser Drawtube extension thumbscrew Primary mirror cell Focus wheel Focus wheel Focus lock thumbscrew Focuser thumbscrew Fine focus wheel Secondary mirror holder Figure 1. The 6" Newtonian Imaging Reflector.
Congratulations on your purchase of an Orion 6" Newtonian Imaging Reflector. Your 6" Newtonian Imaging Reflector is a Newtonian reflec tor telescope with high quality optics and excellent mechani cal construction. It has been specially optimized for use with astronomical CCD imaging cameras. These instructions will help you set up and use your telescope. Getting Started The 6" Newtonian Imaging Reflector comes nearly fully assembled from the factory.
divide the focal length of the telescope by the focal length of the eyepiece: Telescope Focal Length (mm) 1.25" nosepiece = Magnification Eyepiece Focal Length (mm) For example, the 6" Newtonian Imaging Reflector, which has a focal length of 750mm, used in combination with a 25mm eyepiece, yields a magnification of 750 mm = 30x 25 mm Every telescope has a useful limit of power of about 45x-60x per inch of aperture.
Reflective surface of collimation cap Primary mirror center mark drawtube Reflection of primary mirror clip a. b. c. d. e. Figure 3. Collimating the optics. (a) When the mirrors are properly aligned, the view down the focuser drawtube should look like this. (b) With the collimation cap in place, if the optics are out of alignment, the view might look something like this.
Spider vane thumbnuts the reflection of the secondary mirror within the primary mirror reflection (the smallest circle, with the collimation cap “dot” in the center) is off-center. You will fix that in the next step. Once the secondary mirror is centered in the focuser draw tube, and the primary mirror reflection is centered in the sec ondary mirror, the secondary mirror is properly aligned, and no further adjustments to it should be needed. Aligning the Primary Mirror Figure 5.
Keeping the dust cap on the focuser’s 1.25" opening is also a good idea. Improper cleaning can scratch the mirror coatings, so the fewer times you have to clean the mirrors, the better. Small specks of dust or flecks of paint have virtually no effect on the visual performance of the telescope. Out of collimation Collimated Figure 8. A star test will determine if the telescope's optics are properly collimated.
100% isopropyl alcohol. Submerge the mirror (aluminized face up) in the water and let it soak for a few minutes (or hours if it’s a very dirty mirror). Wipe the mirror under water with clean cotton balls, using extremely light pressure and strok ing in straight lines across the mirror surface. Use one ball for each wipe across the mirror. Then rinse the mirror under a stream of lukewarm water. Any particles on the surface can be swabbed gently with a series of cotton balls, each used just one time.
