Sigma has announced yet another new lens. This one's a pretty big step forward: the Sigma 120-300mm f2.8 EX DG HSM lens is a digitally-optimized 300mm telephoto zoom lens with a f2.8 maximum aperture. They took a large-aperture 300mm f2.8 lens and turned it into a zoom lens with a total of three SLD glass elements.
You can find more information about the lens from Sigma.
