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Hi Andrew, yes planetary imaging is a whole different story for sure. I'm specifically thinking of deep sky imaging with exposures on the order of minutes or more, where the seeing effectively limits the resolution.
My native resolution is 0.86"/pixel and with that I seem to get FWHM's in the range of 2"-3" depending on seeing conditions, which seems quite reasonable to me. So perhaps my question really is how accurate does a mirror have to be in order to still achieve the same FWHM with that image scale?
When I image Jupiter using high FPS I can easily record sub-arsecond details, so that's why I assume that the accuracy of my (probably very average) mirror is clearly higher than necessary for deep sky imaging.
Last edited by SkyViking; 20-04-2012 at 03:39 PM.
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