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Finder scope | Accessory |
bracket | collar |
9x50 Finder
Scope
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| Optical |
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| tube |
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| Fine focus wheel |
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Drawtube |
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tensioning |
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thumbscrew |
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Focus wheel
Figure 1. The Orion 8" f/3.9 Newtonian Astrograph
Congratulations on your purchase of an Orion f/3.9 Newtonian Astrograph! These powerful imaging telescopes feature “fast,”
This instruction manual covers both the 8" and 10" mod- els of f/3.9 Newtonian astrograph. Although they differ in aperture and focal length, physical size, and weight, they are otherwise very similar in mechanical construc- tion and features. So we will use the 8" model to illus- trate the features of both astrographs. Any exceptions related to the 10" model will be noted.
This instruction manual will help you to set up and properly use your telescope. Please read it through completely before attempting to use the scope and its included accessories.
WARNING: Never look directly at the Sun through your telescope or its finder scope – even for an instant – with out a professionally made solar filter that completely cov ers the front of the instrument, or permanent eye damage could result. Young children should use this telescope only with adult supervision.
Parts List
•Optical tube assembly
•Optical tube dust cap
•1.25" eyepiece holder
•9x50 finder scope with bracket
•Pair of hinged tube rings
•2" thread-on extension adapter, 30mm
•2" slip-on extrension adapter, 36mm
•Quick collimation cap
•Cooling accelerator fan and battery holder (batteries not included)
•Starry Night Special Edition CD-ROM and StarTheater
DVD
We recommend keeping all of the original packaging. In the unlikely event you should need to ship the telescope back to Orion for warranty repair service, you should use the original
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