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Message: <blockquote data-quote="J-see" data-source="post: 428914" data-attributes="member: 31330">Evidently the same lens is the same lens and the image both types receive is exactly identical, quality wise. Even the fact that the one uses a portion of the lens -the center part- while the other uses it fully makes no difference.Until you add the rest of the cam to the equation. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink    ;)" loading="lazy" data-shortname=";)" />There's no disagreement that the center of a lens is usually the better part of it. I didn't hear of any lens that has excellent corner performance but doesn't do well in the center. But there's this idea, which I shared, that therefor the DX has an edge on the FX when shooting the same lens. It's not that simple it seems.</blockquote>