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Old 28-04-2012, 07:40 PM
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alocky (Andrew lockwood)
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Join Date: Aug 2010
Location: perth australia
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Quote:
Originally Posted by DavidU View Post
Here is one of Rohr's optical tests. This is a superb mirror in all respects , now check out the resolution it is capable of in the 3.3u artificial stars test.In there is also the star resolution test of a GSO mirror and a few others. It clearly shows fine resolution is better with an extremely good mirror.
http://translate.googleusercontent.c...M0Kw#post30967
I'm pretty sure the advantage of good optics isn't under question, my understanding of the original post was whether you could actually translate that superior resolution into a better image in real world conditions. Peter Ward has demonstrated what is possible with good optics, and I suspect more importantly, good seeing. It would be nice to know how close his image approaches the theoretical perfomance of the system, or would a c14 have done just as well that night? Would a 'cheapy' 20" have done even better (notwithstanding the challenges of mounting larger instruments)?
cheers,
Andrew.
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