Matt Wedel over at 10 Minute Astronomy just posted two interesting posts on telescope aperture. in the first, What Aperture Costs, he breaks down the cost per square inch for several popular telescopes from 4.5 inches up to 16 inches. The second, Why Aperture Matters, covers some of the optical realities of aperture, and also the functional, at the eyepiece, differences.
I found both posts to be enlightening and timely, given my current quest for aperture. If you don't yet subscribe to Matt's blog, I suggest you should.
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