im thinking of getting a UWA lens for my 50D. i would prefer to use it more indoors for group portraits than for landscape shots (though the ability to shoot urban landscapes would be nice as well every once in a while)
i know the usual suspects - canon 10-22, sigma 10-20 3.5, sigma 10-20 4-5.6, and tokina 11-16 2.8
since this would be a rarely used lens, i wouldnt want to spend the canon premium, which leaves the 2 siggys and the tokina. it seems to me that the fixed aperture siggy would be better than the variable aperture, but i feel like theres a catch...
what would the masses recommend?