We're told the next Art series lens from Sigma will be an 85mm f/1.4 DG HSM Art. However, it's not coming any time soon. There's still a small possibility that a new 135mm Art series lens will arrive first, but Sigma feels there will be a higher sales volume likelihood with the 85mm focal length, and will do their best to get it to market first.
A new 24-70 f/2.8 OS DG HSM Art is also a possibility, as the chance of an f/2 version has diminished due to costs of development and production. One of Sigma's biggest marketing strategies is a significantly lower price than the Canon or Nikon version of a lens. That just wouldn't be possible with an f/2 wide angle zoom for a full frame camera. One example of a lens that hasn't done well because it wasn't cheaper than the comparative Canon has been the possibly discontinued 24-105mm f/4 DG OS Art. Yes it would be a stop faster, but would people spend more on a Sigma lens that is a stop faster than the Canon of equal focal length? A stabilized f/2.8 Art version could probably be made for far less money and would carry much less risk for Sigma.
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