Oh I'm not really serious about it, I'd rather use the ED80, though I'm sure someone sometime will be, which is why I was fairly specific in the thread title.
At f8 (500mm/100mm = f5 so that obstruction is pretty significant) though it might be ok for luna imaging without having to carry a telescope around. Or maybe you could adapt a visual back for it and create a cheap 500mm mak? Just ideas.
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