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Re: [APML] Polar alignment vs. flexure star trails

Adam, best if you can post a small pic you've taken so we can see what you see.
 
Stuart
----- Original Message -----
Sent: Monday, August 29, 2005 9:20 PM
Subject: [APML] Polar alignment vs. flexure star trails

Hello,
 
I'm new to the group and am starting in film astrophotography.  I have taken some shots at prime focus and have noticed star drift.  I am autoguiding with a webcam on a seperate guide scope.
 
Right now I am assuming that if I am autoguiding on a star, then if my polar alignment is off, the field of stars would rotate and trail around the guide star, with the guide star standing still.  Is this correct?
 
I am also assuming that if my star trails aren't rotating around the guide star, that this is because of flexure between the guide scope and the main scope.  Is this correct?
 
I am trying to see weather my trails are caused by poor polar alignment or flexure and if my second assumption is correct, then I need to work on the flexure between the scopes.
 
Thanks for you help,
 
Adam

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