View Single Post
  #14  
Old 14-06-2008, 06:49 PM
Zuts
Registered User

Zuts is offline
 
Join Date: Mar 2007
Location: sydney
Posts: 1,836
Quote:
Originally Posted by g__day View Post
Well two side by side scopes - one says the star is not drift - the other says it is. Focus looks pretty good on both - so I wonder what can cause the pointing error if its not a small - say 7 arc minute mirror shift?

The fact two side by side scopes reported different results under full automate drift aligning - and believing the small scope produced such dramatic benefits for both scopes makes me think it has to be the mechanical flexure in the larger scopes optics causing this error.
If your mirror is shifting then why isnt the focus changing?

Paul
Reply With Quote