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Message: <blockquote data-quote="Marcel" data-source="post: 153508" data-attributes="member: 3903">You have to first realize that it's not the lens that is doing the focusing, it's the camera. Some cameras behave better in low light and some cameras simply cannot have great focus ability at f8. It's the focusing components of the camera that gives the lens the orders to focus in such and such a way, so the lens has not much to do with it.So, in order to satisfy your curiosity, you'd have to sample the body you have with any lens but using the depth of field preview button before letting the camera trying to focus. This would give you an idea of how it would behave with a lens that would have a maximum aperture of f8.</blockquote>