Sigma has recently announced their 18-35mm f/1.8 DC HSM lens. This is the world’s first lens that offers a fixed f/1.8 aperture throughout its zoom range. The fixed f/1.8 aperture breaks new ground in the camera lens industry, as the zoom lenses of Canon and Nikon top out at f/2.8. This Sigma lens offers more than a stop of extra light. Read the Sigma official announcement on their website and see sample images here.
It seems Sigma has embarked on an aggressive new lens program for 2013. The next ART lens to be announced may be the 135mm f/1.8 DG OS, together with the 24mm f/1.4 and 50mm f/1.4 plus an additional lens. They are also working on a fast ART lens for full frame cameras. As you probably know, Sigma currently has the most powerful zoom lens on the market, the 200-500mm f/2.8 APO EX DG. Sigma is getting to be a very innovative company and not afraid to break new grounds. Canon needs to hurry up and release a few of their new lenses in 2013.