Thread: Guiding woes
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Old 28-03-2012, 10:18 PM
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rat156
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Join Date: Aug 2005
Location: Melbourne
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Hi Charles,

I've cast an eye over your sub of OC.

Doesn't appear to be a collimation problem.

Focus isn't quite right, these scopes are very finicky on focus I've found, watch out for cool down issues, the focus changes.

It does look a bit like a guiding issue, but not in DEC. Are you sure your DEC axis is horizontal in the sub? Either way, with AO and an OAG, your mount's guiding should not be being utilised much if you're PA is good.

Which AO unit are you using? Try not using it and see if the star shape changes. Does the mount need to be "bumped" when the AO runs out of travel?

Cheers
Stuart
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