Wed Apr 12, 2017 4:22 pm
Yes, the Sigma Arts are heavy, but very nicely built. For me, weight/size isn't an issue as long as the image quality's top-notch. The Sigma 24-105 loses some sharpness beyond 90mm (to the point where I'd say the Canons have a fractional edge), but below that it's noticeably better, particularly at 24mm.
The estimated cost of the new 24-70 f/2.8 Art is around £1200 (EUR1500), so it's not cheap; for that price it's going to have to be better than the Canon f/2.8s! To be honest I think it will be, otherwise Sigma will have their first Art flop!
Another reason to go Sigma Art/Sport is for the USB dock, which calibrates far more precisely than in-camera MA.
Karl