Quote:
Originally Posted by RugbyRene
Seriously you guys? No wonder these forums seem so impsoing to new posters. Someone asks what is a very valid question and you guys turn it into a joke. Instead of making fun of the question maybe, just maybe you could contribute something worthwhile. 
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OK, fair enough. Since I've never contributed anything worthwhile before I shall attempt to now. The 'best' optical system I assume to be defined by spot size across the imaging sensor area, since Greg asked about imaging (which, incidentally, he is not exactly a novice at). This will be the smallest for the largest aperture of any given optical design. End of story - very basic physics. Assuming the designer and optician have done their job there are a few options commercially available and I would argue none are 'the best'.
Now as to why anybody actually considering undertaking the purchase of an imaging instrument of this size would be relying on the opinion of an open Internet forum -? Then I sincerely hope they do some more detailed research. You are not going to buy it from Australian Geographic, and it is probably not for the easily intimidated or humourless.
Better?