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i n s t r u c t i o n M a n u a l
Orion
Premium 190mm
®
f/5.3 Maksutov-Newtonian
Astrograph
#9978
Providing Exceptional Consumer Optical Products Since 1975
OrionTelescopes.com
customer support (800) 676-1343 • E-mail: support@telescope.com
Corporate Offices (831) 763-7000 • 89 Hangar Way, Watsonville, CA 95076
IN 370 7/09
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Table of Contents
Related Manuals for ORION TELESCOPES & BINOCULARS 9978
Summary of Contents for ORION TELESCOPES & BINOCULARS 9978
- Page 1 M a n u a l Orion Premium 190mm ® f/5.3 Maksutov-Newtonian Astrograph #9978 Providing Exceptional Consumer Optical Products Since 1975 OrionTelescopes.com customer support (800) 676-1343 • E-mail: support@telescope.com Corporate Offices (831) 763-7000 • 89 Hangar Way, Watsonville, CA 95076 IN 370 7/09...
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Page 2: Parts List
Finder scope dovetail base Corrector lens Dual-Speed Focuser Primary mirror cell Figure 1. The Premium 190mm f/5.3 Maksutov-Newtonian Astrograph optical tube assembly. Congratulations on your purchase of an Orion We recommend keeping all of the original packaging. In the ® unlikely event you should need to ship the telescope back to Premium 190mm f/5.3 Maksutov-Newtonian Orion for warranty repair service, you should use the original... -
Page 3: Cooling The Telescope
Focus tension set screw Thumbscrew lock Focus lock thumbscrew Figure 3. Figure 2. Slide the finder scope bracket into the finder scope Use the focus tension setscrew to adjust the weight capacity of the focuser. Tighten the focus lock thumbscrew to lock dovetail base and secure it in place by tightening the thumbscrew lock. -
Page 4: Collimating The Optics (Aligning The Mirrors)
Figure 5. Collimating the optics. (a) When the mirrors are properly aligned, the view down the focuser drawtube should look like this (b). Here, the secondary mirror is centered under the focuser, but it needs to be adjusted (tilted) so that the entire primary mirror is visible (c). -
Page 5: Aligning The Secondary Mirror
Knurled retaining ring Metal cap Figure 7. Loosen the knurled retaining ring on the secondary mirror holder to allow the secondary mirror holder to rotate. Figure 6. Unthread the metal cap that covers the secondary Secondary mirror collimation screws. mirror alignment so it should be checked regularly. -
Page 6: Care And Maintenance
Figure 9. tilt of the primary mirror is adjusted with three pairs of collimation screws. Primary collimation adjustment screws Out of collimation Collimated Figure 10. A star test will determine if a telescope’s optics are properly collimated. An unfocused view of a bright star through the eyepiece should appear as illustrated on right if optics are perfectly collimated. -
Page 7: Specifications
Cleaning Optical Surfaces In general, your telescope will only need to be cleaned on a very minimal basis. Dust particles on the corrector lens will not affect the optical quality of your 190mm Mak-Newt. Fortunately, because the 190mm Mak-Newt is a closed tube design, the primary and secondary mirrors will barely accumu- late any dust (if dust caps are kept on during storage). -
Page 8: One-Year Limited Warranty
One-Year Limited Warranty The Orion Premium 190mm f/5.3 Maksutov-Newtonion Astrograph is warranted against defects in materi- als or workmanship for a period of one year from the date of purchase. 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.
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