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SCT is way out of collimation how can I get it back into alignment?

Started by tom j, 03/10/2023 03:09PM
Posted 03/10/2023 03:09PM Opening Post
My Meade 12 inch classic lx200 is so far out of collimation I cannot focus on anything.  my Zwo asi290mm mini  cannot reach focus. pictures from it are just blown out white.  no matter how I adjust the scope nothing can be seen (not even shadows).  How can I find a reference point between the focuser ,the corrector plate position and the secondary mirror position.  I am at an impasse.  Any ideas you may have are appreciated.  Tom Jackson
Posted 03/24/2023 08:40PM #1
Page 52 & 53 of the owner's manual

Rolando Chavez

Posted 04/09/2023 02:29PM #2
When I had a LX200 many, many years ago, I used a reflective round Christmas ornament placed in the sun and used that as a target if you can find one. Makes it very easy to see the diffraction rings and get it perfect.
Posted 04/09/2023 04:46PM #3
great idea Ill give it a try when the clouds clear up , thanks tom jackson