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Stargazing Help! My telescope fell and now it won't focus

  1. Apr 8, 2009 #1
    It fell halfway over, denting my metal garbage can lid. The finderscope came off but I could easily reattach it. I can see light and blur now....what should I do?? I don't want to just open it up without knowing what I'm looking for. Thank you!!!
  2. jcsd
  3. Apr 8, 2009 #2


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    Staff: Mentor

    What's the model number?
  4. Apr 9, 2009 #3


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    Science Advisor

    General suggestion: Try checking the collimation.
  5. Apr 9, 2009 #4


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    Gold Member

    Sounds like a reflector which fell 'headfirst', suggesting the seconday mirror mount is now misaligned. Assuming it has a spider mount, loosen and retension the mounting screws until it recenters. You can do this in daylight using a distant object to roughly recenter the focal plane, then a bright star at night to fine tune it.
  6. Apr 9, 2009 #5
    What type of telescope is it, Refractor, Newtonian or Catadioptric ?
  7. Apr 9, 2009 #6
    The model number is 78-8840
  8. Apr 9, 2009 #7
    Thanks so much everyone. It is a Mak Cassegrain by Bushnell. I will try your advice, first, Chronos. Thank you.
  9. Apr 9, 2009 #8
    I got it! I unscrewed it, opened it up and put it all back and Voila! It's perfect! Thanks!
  10. Apr 10, 2009 #9
    Hey! good stuff. :-)
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