Originally posted by incitatus wow that's some serious vignetting. I think it proves the DA* can't handle any larger sensor
My guess is that there was a filter on the lens. My DA* was not that bad at 16mm, even with a low profile polarizer. Actually, both result show serious vignetting, though the DA is worse.
In all fairness, my second copy of the DA* was exceptional except for an issue at 16mm, f/2.8 at infinity which I've written about. Too bad the AF stopped working - it's now en route to Pentax for warranty work.
roentarre's posts show results when compared with one of the best primes available. Differences are only discernible at 100%. I think that is excellent for a zoom at the extreme of its range. After all, if someone really wanted a pic of the tree, they'd simply zoom to 50mm. Unlike a prime, it's not limited to one focal length.