Quote:
Originally Posted by Peter Ward
I suspect there are several factors at work, and subscribe to the theory if the seeing is "slow" then the correlation can be high across a good sized aperture.
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I don't disagree with that but your whole field is way over a couple of degrees across?
Quote:
Originally Posted by Peter Ward
I also have no doubt virtually instant and accurate guiding corrections by deftly moving few tens of grams of AO, rather than 100kg of telescope/counterweights/mount pays a dividend. However you cut it, tighter and brighter stars is the result I see time and time again.
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No argument there.
Quote:
Originally Posted by Peter Ward
By the way, I was guiding at a slovenly 2Hz...sadly a brighter guidestar was not available.
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Yes it is also my experience up to 5Hz is realistically achievable and does an excellent job at smoothing all the "noise".