Sigma Japan has just filed a new lens patent on Sigma 200mm f/2 DG OS HSM Sports lens. And Sigma also filed a TELE CONVERTER 1.4x for Sigma lenses. Canon and Nikon both has their 200mm f/2 lenses, both cost $5,699, the Sigma 200mm f/2 DG OS HSM lens could be much cheaper.
Sigma Japan has just filed a new lens patent on the new art zoom lens, the long awaited Sigma 24-70mm f/2.8 DG OS HSM Art Lens. According to previous rumors, the lens could be announced in next several months, probably at Photokina 2016.
Sigma recently has announced the new Sigma 20mm f/1.4 DG HSM Art lens. The widest f/1.4 lens in the world. According to CanonRumors, in next year 2016, Sigma will announce at least three other prime and zoom lenses for Photokina 2016.