I've looked at the Moon & planets through all my 8 scopes, from 2" to 17.5". The 2" aside, typically best I can do is 150X. On those occasions that seeing is better this can be upto 250X. At sea level this is the best I've managed with good steady seeing. Only once was I able to take my big dob to 330X, but seeing wasn't too bad, say 50/50 steady, & again at sea level. I really haven't attempted high magnification on these objects from my customary dark sky site that's at 1000m - I've got other fish to fry at a dark site than the Moon or planets which I leave for when I'm at home.
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