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INSTRUCTION MANUAL
Orion
®
™
Apex
Maksutov-Cassegrain
™
Optical Tube Assemblies
#9820
#9823
#9825
Apex 90mm
Apex 102mm
Apex 127mm
Customer Support (800) 676-1343
E-mail: support@telescope.com
Corporate Offices (831) 763-7000
P.O. Box 1815, Santa Cruz, CA 95061
Providing Exceptional Consumer Optical Products Since 1975
IN 161 Rev. B 0109
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Summary of Contents for Orion 9820
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Page 1: Optical Tube Assemblies
INSTRUCTION MANUAL Orion ® ™ Apex Maksutov-Cassegrain ™ Optical Tube Assemblies #9820 #9823 #9825 Apex 90mm Apex 102mm Apex 127mm Customer Support (800) 676-1343 E-mail: support@telescope.com Corporate Offices (831) 763-7000 P.O. Box 1815, Santa Cruz, CA 95061 Providing Exceptional Consumer Optical Products Since 1975... - Page 2 Dovetail holder Mounting block but all models have similar components. These instructions will help you set up and proper- ly use and care for your telescope. Please read them over thoroughly before getting started. Parts List Qty. Description Optical tube assembly 25mm Sirius Plössl eyepiece...
- Page 3 Please keep the original shipping box. In the unlikely event you should need to ship the telescope back to Orion for war- ranty repair service, you should use the original packaging. The box also makes a very good container for storing the tel- escope when it is not in use.
- Page 4 It is not uncommon for an observer to own five or more eyepieces. Orion offers many different eyepieces of varying focal lengths, so check the catalog or website for a wide selection of addi- tional eyepieces to choose from.
- Page 5 A good star chart or atlas, like the Orion DeepMap 600, can come in handy for helping locate interest- Eyepiece ing objects among the dizzying multitude of stars overhead.
- Page 6 T-ring If you would like to change the orientation of the camera rela- tive to the telescope, do so by first loosening the knurled ring located in front of the eyepiece adapter (see Figure 6). You can then rotate the camera (and eyepiece adapter) to the desired orientation.
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Page 7: Specifications
For the large surface of the meniscus lens, clean only a small area at a time, using a fresh lens tissue on each area. Never reuse tissues. Specifications #9820 Apex 90mm OTA Optical design: Maksutov-Cassegrain Aperture: 90mm Effective focal length: 1250mm Focal ratio: f/13.9... -
Page 8: One-Year Limited Warranty
This warranty is for the benefit of the original retail purchaser only. During this warranty period Orion Telescopes & Binoculars will repair or replace, at Orion’s option, any warranted instrument that proves to be defective, provided it is returned postage paid to: Orion Warranty Repair, 89 Hangar Way, Watsonville, CA 95076.