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My images are moderately under sampled, that being said, Im happy with the images... Under sampling can cause blocky looking stars when one star covers less than one pixel.. the star will appear square and unnatural.. My seeing here rarely gets better than 3 FWHM, my current resolution is 3.35" per pixel. I would think then that with the average of 3 FWHM seeing, having a better resolution would likely not make too much difference to the quality of my images.. If however I regularly experienced 1FWHM seeing, I would want a camera with smaller pixels that would result in roughly 1" per pixel.
If I was setting up what I'd consider a perfect imaging system, I would aim for between 0.7~0.9 arc sec per pixel.. Some would call that grossly oversampled for most conditions.. but I say, better to have it and not need it than to need it and not have it...
Alex.
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