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Message: <blockquote data-quote="BackdoorArts" data-source="post: 555680" data-attributes="member: 9240">I've actually had time to really read the article.  It's an interesting read, but it's also very misleading in some ways.  It's more about lens ratings than anything to do with an FX lens rendering an image any differently on a DX body than it would in the cropped portion of an FX body.  And that is what I thought the initial question was all about.  Yes, a DX shooter who never upgrades to full frame may be "wasting" both light and (probably) money by purchasing that expensive full frame glass, but there's also optical quality to consider as well.  DX glass wastes light all the time, but it does it by not projecting it through the last element - it's just lost against the walls.</blockquote>