This is a bit unexpected...Sigma has announced a new 24-35mm f2 zoom lens featuring similar optical performance to the Sigma 35mm f1.4 which I reviewed previously and was (still am) a big fan of. While the Sigma 18-35mm f1.8 (also reviewed) offered an amazing range with a wide aperture, it was still limited to APS-C cameras. However, Sigma's new 24-35mm f2 lens will now work on full frame cameras!
We should expect availability in the next 6 weeks for Canon cameras with Nikon & Sony usually following later. The price has not yet been announced but expect it to be higher than the $799 price tag on the 18-35mm. Unfortunately I find the new 24-35mm to be decidedly less useful. While Sigma touts the ability to replace both 24mm and 35mm prime lenses, the slower aperture will certainly be missed. Unless the price is low, I would likely prefer having the f1.4 apertures on the 24 and 35mm lenses than the convenience of a free spot in my bag.
You can preorder the lens today at: B&H Photo