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<p>[QUOTE="-jeffB, post: 5179106, member: 27832"]I'd expect picture-frame glass to be optically flawed -- the surfaces may not be especially smooth, and there may be small internal defects. This isn't an issue when there's an item right behind the glass and you're looking at it straight on, but as angle and distance to the subject increase, those defects will affect image quality.</p><p><br /></p><p>I've got Canon DSLRs with some high-end autofocus lenses, and they often fail when I'm trying to shoot through windows or doors at an angle. Now, that's double-paned glass, so the effect is exaggerated, but even a single pane can produce many of the same issues. It's not necessarily something you'd pick up with your naked eye, but it can become <i>very</i> pronounced when you're doing photography.[/QUOTE]</p><p><br /></p>
[QUOTE="-jeffB, post: 5179106, member: 27832"]I'd expect picture-frame glass to be optically flawed -- the surfaces may not be especially smooth, and there may be small internal defects. This isn't an issue when there's an item right behind the glass and you're looking at it straight on, but as angle and distance to the subject increase, those defects will affect image quality. I've got Canon DSLRs with some high-end autofocus lenses, and they often fail when I'm trying to shoot through windows or doors at an angle. Now, that's double-paned glass, so the effect is exaggerated, but even a single pane can produce many of the same issues. It's not necessarily something you'd pick up with your naked eye, but it can become [I]very[/I] pronounced when you're doing photography.[/QUOTE]
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