INSTRUCTION MANUAL Orion ® Schmidt-Cassegrain Telescopes 8", 9.25", & 11" Customer Support (800)-676-1343 E-mail: firstname.lastname@example.org Corporate Offices (831)-763-7000 P.O. Box 1815, Santa Cruz, CA 95061 Providing Exceptional Consumer Optical Products Since 1975 IN 265 Rev. A 8/05...
Congratulations on your purchase of an Orion Schmidt-Cassegrain telescope! cal system uses a combination of mirrors and lenses and is referred to as a compound or catadioptric telescope. This unique design offers large-diameter optics while maintaining very short tube lengths, making them extremely portable and versatile. The Schmidt-Cassegrain system consists of a zero-power corrector plate, a spherical primary mirror, and a secondary mirror.
(#7215) to the telescope. Line up the through-holes in the base with the threaded holes in the rear cell of the telescope tube. Then insert the two supplied screws through the base and thread them into the telescope holes until secure (Figure 3a).
2 Release the altitude and azimuth clamps of your telescope mount and point the telescope at your target. 3 Center your target in the main optics of the telescope. You may have to move the telescope slightly to center it.
If you want to continue observing, the dew must be removed, either with a hair dryer (on low setting) or by pointing the telescope at the ground until the dew has evaporated.
Even though the star pattern appears the same on both sides of focus, it is asymmetric. The dark obstruction is skewed off to the left side of the diffraction pattern indicating poor collimation. Or, if you do not want to power up your telescope, you can use Polaris. Its position relative to the celestial pole moves very little, thus eliminating the need to manually track it.
Orion warrants this telescope to be free from defects in materials and workmanship for two years. Orion will repair or replace such product or part thereof which, upon inspection by Orion, is found to be defec- tive in materials or workmanship. As a condition to the obligation of Orion to repair or replace such prod- uct, the product must be returned to Orion together with proof-of-purchase satisfactory to Orion.