New 300 f/2.8 OS & 400 f/2.8 OS lenses coming?
We've been told again that Sigma will likely announce new “sport lenses” some time in 2014. The first two to come will be the 300mm f/2.8 OS and 400mm f/2.8 OS. One of these lenses may be in testing for the Sochi Olympics this winter. A new 500mm and 800mm zoom lens could also be on the horizon, but less is known about them at this time.
A recent patent for a 300 f/2.8 from Sigma does make a good case for the updates.