sigma 12-24 is great
was using 16-35L before, change to 12-24 because of the 16-35 barrel distortion, and never regret since then...
and 12mm WA effect is just overwhelming
now i'm 12mm addict.. >_<
ah ya, i'm travelling with 12-24 and 24-105 right now... good combo...
but i miss my 85 and 135 >_<