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not sure
I don't know if there is a great difference between my present mirror and a premium one but that is one of the unknowns that I hope this thread will answer.
I do know however, to answer another question, that we have very dark skies where I live in the Philippines and on occasion our sky is exquisite. Some refer to it as the Flame nebula, some as the Tank Tread Nebula and Orion software refers to it as Orion B, but by whatever name you use last year I caught it in my 4.5" short tube Orion reflector, on 2 separate nights.
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