Quote:
Originally Posted by glend
When you defocus a star how do the collimation rings appear? Suggest you read Astrobaby's excellent article on collimation, which should still be available here in the "Projects and Articles" subforum.
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Hi Glen,
I have tried that defocusing of stars.
I am not able to make out that many rings, but what I can see is that it looks as if it is in the center.
Will have a look at that article from Astrobab, see if I can understand it.
Regards
Michael