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Message: <blockquote data-quote="elkcub" data-source="post: 1303105" data-attributes="member: 14473">Kevin,Are you kidding?  I can't even find my own stuff on BF.  I agree the Astronomics article doesn't provide much insight into the underlying optical physics, but "bogus" is a strong word.  Is it wrong, or just incomplete?  You know, I like the way you put it.  Social aspects are fascinating.  The 'wisdom of the market' seems to be saying that roof products meet the public need better than Porros, at least beyond some price point.  Most folks are not binocular mavens, so for them subtle optical distinctions don't matter. When I visit REI and see that they are selling large quantities of bubble-pack bins to outdoor nature enthusiasts, it also makes me scratch my head.  In that case, however, the bins are Porros, most often, and below the roof's price point.  So, I suspect that poor quality is being conditioned into the public mind for Porro designs, which reinforces the idea that higher priced roofs must be better.  Ed</blockquote>