According to various sources from the past few days, Sigma will be announcing a new 24-35mm F/2 lens tomorrow, and they even have what appears to be the official product shots of the lens. So this looks to be a legitimate leak.
The leaked images also reveal that the lens filter diameter will be 82mm and that build wise it is similar to the rest of the ART series. It is not quite the Sigma 24-35mm F2 DG that people were hoping for, but this is still a pretty amazing piece of kit. Constant F/2 zoom on full frame. Wow, the more that I think about it, the more I am impressed with it.
The Sigma 24-35mm F2 DG HSM Art lens will be the largest aperture full-frame zoom in production. More information to be posted when we get the official announcement, which may come tonight. No pricing or availability has leaked yet. Luckily, we only have to wait until tomorrow to find out, so stay tuned. We will have all the details for you whenever we get the official info from Sigma.
We will update the latest information about the configuration and the date of publication as soon as possible when we have further information.