According to Canonwatch, Sigma will announce a new wide-angle art lens for full frame DSLRs. This rumored lens is Sigma 16-20mm f/2 DG Art lens.
We have heard before Sigma will announce the 24-70mm f/2 DG OS art lens, but nothing else about this rumored wide-angle zoom lens. And this is a very shoot zoom lens, not like Nikon’s 14-24mm f/2.8.
Stay tuned for more info.