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So that means your star will be elongated by one and a quarter pixels in the y direction for each minute of sub exposure duration. Which way do you have the camera orientated - ie is x lined up with RA or DEC?
The other thing to check - is this the same amount of drift regardless of where the scope is pointing - ie is it worse when the scope is pointing east/west/directly overhead etc.
Last edited by peter_4059; 10-10-2010 at 09:42 PM.
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