u obviously dun get the point.
people are not disparaging sigma. rather, and i say again in case u din get it, the 1st 2 sigma lenses are NOT meant for a full-frame camera like a 1dsmk3.
if correcting u is being pompous and elitist... then we are guilty as charged.
btw, if u have been reading abt FF cameras from canon, no less than michael reichmann of luminous-landscape.com have already said that a FF camera demands much more from lenses than crop-factor cameras. hence, it is natural for canon-users of FF cams like the 1dsmk3 to turn towards L-lenses (and even then, not all L-lenses are top-drawer stuff). it is not abt being pompous. it is being practical - u pay $12K for a camera. obviously u will want to extract the best performance, rite?