I'd like to quote Mattheson from Der vollkommene Capellmeister. In his foreword (I read from [the english translation][1] that's close to impossible to get hold of these days. Publishers take note: this book requires a reprint!) he writes:
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In France they say:
Scholars are all of the opinion that it would be impossible for an individual to bring even only one branch of knowledge to perfection; but, in order to do this, it would be absolutely essential that many scholars pool their resources, render mutual assistance, and work collectively. For experience shows that nothing of significance is achived until matters are taken up through such cooperation.
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I think this is one of the nicest places I've ever ...
Peter Spiro wrote an article making the argument to use Nikkor lenses on Canon EOS cameras. It fits nicely with the manual focus argument I've been making. Out of special interest, he has copied a table comparing 50mm lenses. I've decided NOT to go for a Canon 50mm lens, even though I've used my friends f/1.4 extensively.
Haje Jan Kamps has written a great article on macro photography. Not quite pinhole, but that direction