The Sigma rumormill has been active recently. We were told that there might be a Sigma 24-70mm f/2.8 ART series lens for CP+, but we haven't seen anything confirmed as of yet. The show is set to commence on February 23, 2017 in Yokohama, Japan. The source did follow-up and tell us that there are working prototypes of a 24-70 Art, but that an announcement date isn't definite.
The latest rumors is that Sigma will announce the following lenses some time in 2017.
- Sigma 135mm f/1.8 Art
- Sigma 14mm f/1.8
A Sigma 135mm f/1.8 OS Art has been rumored since 2013, and it is likely being developed.
As for the Sigma 14mm f/1.8, we suspect if such a lens is coming, that it'll be for APS-C cameras. Sigma announced the 12-24mm f/4 DG Art series lens back in September and that's likely going to be your choice for a super wide angle lens for full frame cameras.
We weren't able to confirm either lens at the time of writing this, but we do hope to hear more about Sigma's immediate plans soon.