« on: August 30, 2013, 11:09:13 AM »
I would like a lens, preferably for FF, that goes wider than my 17-40 L and with less mushy corners. I've rented Sigma 12-24 II and Tokina 16-28 and both of those - the copies I rented, anyway - were much better on the edges and in corners. I've also owned and/or rented on APS-C Sigma 8-16 (quite good) and Tamron 10-24 (bad), but with no overlap to compare with 17-40 on FF. (Faster apertures would be preferable as I tend to use such lenses for interiors rather than landscapes, and in buildings where tripods are usually verboten.)
I'm fairly familiar with the various recommendations for lenses that fit on Canon and Nikon bodies, am aware that for many the ne plus ultra zoom is the Nikon 14-24, and have also seen comments here to the effect that some crop lenses for Canon yield better results on crop bodies than FF lenses on FF bodies (though I don't think these have ever been backed up by examples).
My question is cross-format and cross-brand. What are the best ultrawide lenses, period, regardless of brand or sensor size? Are there any sites where one can find comparisons showing the same scene shot by, say, Nikon 14-24 on FF vs Panasonic 7-14 (14-28 equiv.) on M43 vs Canon 10-22 on APS-C? Anyone here have any personal experience of such a comparison? I've not run across anything along those lines (perhaps it's an unreasonable request), but maybe my searches haven't been thorough enough....