Quote:
Originally Posted by Wavytone
And yes you are reasonably correct in suggesting 200-250X is about the upper limit for most scopes if the seeing is average ("average" seeing being about 1" of arc).
With the right night, the altitude of the object above the horizon, and your location you can do better, of course; though for most amateurs these nights are about 1 or 2 a year.
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Ditto to that. Yes, you can push past 200x but its rarely worth it - except on those rare nights of rock-steady seeing! They don't come around that often, unfortunately. When they do, you'll remember them for a long time after, too, because they're just so amazing compared to what we normally get.