Sigma is rumored to working on a lens called Sigma 24-70mm f/2 DG OS HSM for full frame cameras. This would be world’s first 24-70mm standard zoom lens offers f/2, faster than Canon & Nikon & Sony 24-70mm f/2.8.
Price and other more info is not available yet, CR said price will be lower than Canon EF 24-70mm f/2.8 II. It is also told this lens will be a lens for Photokina 2014.
Sigma is doing well these years, they have already released 35mm f/1.4 DG and first f/1.8 zoom for APS-C camera. And also rumored to release 135mm /f1.8 and 24mm f/1.4 in 2013. And we are also expecting what revolution product to coming in next two days.