Quote:
Originally Posted by Bassnut
but thats visual (dont understand why that should matter actually, visual vs imaging, if its wobby then it moves around visually and blurs images).
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Comparing visual and imaging you need to make a distinction between the two extremes of bad seeing , one type is the very high frequency turbulence that makes stars look soft vs more slow undulating seeing through which you can still see a lot of detail but often a little distorted, or in little bursts of better seeing. In both cases time exposures used for imaging will show similarly bloated star image although as Peter suggests the lower frequency shifting can be taken out to some extent with adaptive optics.