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| p.1 #2 · Does the 5N 'exaggerate' field curvature? |
It's an interesting idea. If it's purely a matter of field curvature, then images focused on a point at the corner should be sharp -- but that doesn't always do the trick.
I think a more likely explanation is that the NEX is the first interchangeable lens camera with wide lens compatibility, a very shallow registration distance, and an APS-sized sensor. As much as we love it, that combination simply leads to problems -- and the fact that Sony addressed them as well as they have in the second generation of this system is pretty amazing. I would of course love even better performance, but Sony has managed to get this system dialed in rather well, and rather quickly.
I think another piece of the puzzle is that because of the frenzy of interest in figuring out which lenses work well on this system, there's just a lot more information circulating about performance quirks. Very few of my Nikkor lenses are really all that great deep in the corners on a DSLR, either.