For so long Sigma lenses have been seen as something of a cheap and nasty option to the offerings of the main players. Sure they has the "EX" line and a few good pieces of glass but, really, they werent what "serious" photographers used.
Well it seems that Sigma has had enough of that an is determined to stake a claim as a serious competitor to the OEMs.
This PMA (Feb 2010) has seen the latest (and perhaps the most convincing) barrage of new Sigma lenses. These include an 85 1.4, super-ultra wide 8-16mm zoom, a big re-vamp of the 70-200 2.8 with new glass (FLD - more on that later) and IS/VR and the release of a couple of old favorites with IS/VR.
And, not content with simply putting out new lenses, Sigma is pushing into the realms of the OEM further with advances in exotic glass elements with the advent of the new low dispersion glass with the FLD elements.
Heady days indeed and great news for us.