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Rod, my apology about the debate that's developing.
John, I am still confused by your selective quoting. You are just confirming what I had written about the atmosphere being the limiting factor, irrespective of the telescope.
Then the question of the upper limit of magnification I mention, is it a question of the scope's quality? I certainly don't agree with Department Store Specials that say 545X on a dodgy 3" instrument. I limit my statements to my own experience with reasonable quality gear, AND always put the caviat of the atmosphere in my statements. The question asked is on high magnification & I'm seeking to pass on a realistic case, not a fanciful one. If my notion of the 50X per inch is misguided, please point me in the right direction - PM would be good out of this thread.
Of course to ask an achromat to do this is not possible, but the scope in question here is a reflector. I have not read anywhere the OP saying his scope is a refractor. In fact, his original post states it is a reflector. Why all this talk of refractors???
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