Question about Celestron NexStar 8i (600 x 203mm) Telescope

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HI, Just purchased a nextstar 8 and when I tried to view thru the main eye-piece, nothing. Even tried to look at the full moon, nothing again. Yes, all the lens caps are off but it seems like the focas knob is'nt doing anything. I started out with a meade 4" telescope and jumped at the chance to buy this bigger scope. It has the gps and 7x50 finder scope with red cross hairs. It came from Colorado so maybe it got knocked out of wack in shipping. Is there anything I can do or try here ? I'm handy around the house and would like to fix this myself, if it's not to hard. Thanks, Chris

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Check the focus knob and make sure the small "set-screw" is tight and the knob is just not spinning around on the shaft.

DID you turn the knob enough to focus? Sometimes it may take 10 - 20 full turns.

Finally the focuser is attached to a "rod" inside the tube that moves the mirror back and forth to focus the scope. It could have come loose from the rod?

Instructions for disassembly are here:
http://www.celestron.com/c3/support3/index.php?_m=knowledgebase&_a=viewarticle&kbarticleid=2220

and here:

http://www.sciencecenter.net/hutech/misc/focuslk/index.htm this just shows how it works.

Posted on Oct 25, 2010

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Cannot see anything thru telescope even daytime


  1. Get Stellarium or another fine astronomy program
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