Really interesting thread, have definitely learnt a few new things
EDIT: it looks like my next scope will have to be a fast Newtonian- large aperture and fast f/ratio for a reasonable price!
What might also be affecting how stars
appear on a screen is simply resolution of the image; that's where more megapixels may help in making stars
look smaller. I bet that 51mp sensor would for most telescopes produce nice small stars (given normal sampling), at least on a screen...