Yep Doug, it is definitly the rear lens of the scope, that is causing your problem, you would be better off ( yea I know this wont help now) with the Hutech filter screwed into the T-Mount Adapter.
I have a 72mm Hutech filter screwed to the rear element of the Tak, which works great, but I can also get away with a 48mm screwed into the T-Mount adapter, I use either.
If you like I could send up the 48mm one to you to give it a try, and if that fixes the problem than you have your answer.
Leon
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