Sigma 120-300mm f/2.8 DG OS HSM Sports Lens for Canon EF - Brand New review
It's something of a beast in the hands, but if you can tolerate that then the 70-200mm f/2.8 DG OS HSM | Sports will reward you with excellent all-round performance. The fact that Sigma has managed to deliver it at this price makes it all the more impressive.
Very effective image stabilisation, Great build quality, Sharp results, even wide open at f/2.8, Superb control over chromatic aberration
Zoom ring position might bother some, Heavy, even by 70-200mm f/2.8 standards, Some vignetting (particularly at 70mm end), Tripod foot can't be removed