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Old 25-04-2010, 09:03 PM
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Satchmo
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Join Date: Dec 2005
Location: Sydney
Posts: 1,878
Quote:
Originally Posted by AstroJunk View Post
That fantastic mirror punches way above it's aperture!
Actually, a really good mirror performs closest to what its aperture is theoretically capable of for its diameter , and the rest that perform below that. No telescope can perform better than its theoretical aperture but its a nice catch phrase that invokes the idea that fine optics have some kind of magical property.
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