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Old 27-09-2015, 08:20 AM
glend (Glen)
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glend is offline
 
Join Date: Jun 2013
Location: Lake Macquarie
Posts: 7,033
Allan, as I said in my PM on CN, I did not realise you were talking about primary mirror extensions as opposed to normal focuser tube extensions. Personally I would not be fiddling around with the primary location until I had a good understanding of how the scope was performing visually with a range of EPs, then, and only then would I move to camera testing. This gives you a baseline to work from. As I said on CN, go back to basic setup of the primary and work from there. Forget all the accessories and try it with just the camera. Try a DSLR if you can as well. I don't know anything about that corrector that your trying to use but anything with lenses in it in the optical path is going to mess with possible focal point locations so get rid of it for testing would be my advice. Always work from a point where you know things are ok.
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