Quote:
Originally Posted by Somnium
what i am getting at is what exactly is it about the bigger bucket. if the seeing wont allow you to get below .39" in resolution for DSO imaging what benefit does that extra aperture give? is a 20" f4 going to pick up more detail than a 10" f8 shooting for twice the time? or are there really circumstances where .39" of resolution really would be the limiting factor?
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In Aus there is no reason to have a pixel scale better than 0.7 arcsec/pix, the 0.39 is the resolution that the telescope is capable of achieving, not what it is actually going to get.
Case in point, a 10" has a resolution around the 0.5" where as the 20 is closer to 0.25" but if they both have the same focal length the 20" slaughters the 10" because it captures images 4x faster and is able to go deeper (capture fainter objects). Putting a KAF-11002 with its 9 micron pixels will give a resolution of ~0.91 arcsec/pixel which would be pretty much perfect for normal every day imaging.