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07-08-2010, 09:49 PM   #16
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QuoteQuote:
Marc Sabatella: BTW, for those concerned about reports of softness in corners:

Getting a corner in focus at ultra wide and large aperture angle is tough, and not very common in real world shooting. So it's tough to judge corner sharpness fairly. But every once in a while the stars line up and something in a corner ends up being in focus. Here's a 100% crop (10MP K200D) of the extreme upper right corner from a shot at f/5.6, which Photozone found to be only "good" (just like f/4). Supposedly it only becomes "excellent" at f/8. This is what "good" actually means in practice:
Good enough for me too! Marc, thank you for tackling this one.

07-09-2010, 08:12 PM   #17
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Very good point!

QuoteOriginally posted by Marc Sabatella Quote
BTW, for those concerned about reports of softness in corners:

Getting a corner in focus at ultra wide and large aperture angle is tough, and not very common in real world shooting. So it's tough to judge corner sharpness fairly. But every once in a while the stars line up and something in a corner ends up being in focus. . . .
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