Telescopes & Equipment

• Is't this a problem?

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  Posted by FRANK BORGES on Aug 11, 2008; 17:34
  Greetings;
  
  I'm hoping someone may help me with my 10" dob?
  
  When I look at the planet
  Jupiter, at the 5:00 (disk)
  position it displays a blue color fringe ,where the brite
  meets the dark.
  At the 10:00 it shows a red
  fringe.
  I tried rotating the ocular
  and my head, to see if the fringe will also rotate and it does not.
  I did align the light path.
  
  thank you
  
  Frank Borges 02859