The Tamron SP 24-70mm F/2.8 Di VC USD is distinguished by being the first fast standard zoom for full frame cameras to include optical image stabilization. The fact that it does so in a design that includes a ring-type ultrasonic motor for fast, silent autofocus and a degree of weathersealing...
Extremely good optics; Highly effective image stabilization; Silent; accurate focusing; Impressive flare resistance; Very good build quality including sealing; Competitive price compared to camera manufacturers' equivalents
Unpleasant vignetting at F2.8 on full frame at the telephoto end; Slightly less-fast autofocus than Canon or Nikon equivalents (but far from slow; AF and VC switches rather stiff; difficult to change quickly