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Maksutov‑cassegrain
Eyepiece
adapter
Focus knob
Providing Exceptional Consumer Optical Products Since 1975
instruction Manual
orion
®
#9969 Optical Tube Assembly
Mounting plate
Figure 1.
The 180mm Maksutov-Cassegrain optical tube assembly.
180mm
Dovetail holder
customer support (800)‑676‑1343
E‑mail: support@telescope.com
Corporate Offices (831)‑763‑7000
89 Hangar Way, Watsonville, CA 95076
Meniscus lens
IN 291 Rev. B 02/09
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Table of Contents
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Summary of Contents for ORION TELESCOPES & BINOCULARS 9969
- Page 1 Manual orion 180mm ® Maksutov‑cassegrain #9969 Optical Tube Assembly Dovetail holder Eyepiece adapter Mounting plate Meniscus lens Focus knob Figure 1. The 180mm Maksutov-Cassegrain optical tube assembly. customer support (800)‑676‑1343 E‑mail: support@telescope.com Corporate Offices (831)‑763‑7000 89 Hangar Way, Watsonville, CA 95076 Providing Exceptional Consumer Optical Products Since 1975 IN 291 Rev.
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Page 2: Getting Started
Welcome to a new world of adventure! Your new 180mm Maksutov-Cassegrain (Mak-Cass) telescope is a fine-quality instrument designed for both daytime terrestrial viewing and nighttime stargazing. Compact, portable, but with plenty of aperture, and easy to use, this versatile scope will provide many hours of enjoyment for the whole family. -
Page 3: Calculating Magnification
If your eyes are astigmatic, however, images will probably the finder scope is covered with a completely opaque material appear the best with glasses on. This is because a telescope’s or removed altogether focuser can accommodate for nearsightedness or farsighted- Maksutov-Cassegrain telescopes are capable of focusing on ness, but not astigmatism. -
Page 4: Specifications
Never reuse tissues. connect a 35mm SLR camera to specifications the telescope; it threads onto the eyepiece adapter #9969 180mm Maksutov-Cassegrain OTA with eyepiece and Optical design: Maksutov-Cassegrain diagonal removed. Aperture: 180mm T-ring Effective focal length: 2700mm painted finish that is fairly scratch-resistant. - Page 5 Secondary Secondary mirror mirror Reflection of Reflection of Front of your eye in Front of your eye in telescope secondary telescope secondary mirror mirror Secondary Reflection of reflection of inside of tube inside of tube (misalignment) Figure 4b Figure 4a Figure 4a.
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Page 6: One-Year Limited Warranty
It will take a little trial and error to get a feel for how to tilt the mirror using the collimation screw pairs. Again, collimation should only be attempted if you have confirmed the telescope is actually out of collimation by performing a star test. Finishing collimation Once you have finished adjusting your telescope, you will need to perform another star test (described earlier) to check...
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