This lens is the first Nikon wide-angle that features optical stabilization.The Nikon 16-35mm was primarily designed for full-frame cameras; however, it is also usable with APS-C sensor cameras such as the Nikon D7000 or Nikon D5100, with a 25-50mm equivalent range, which makes it a short trans-standard of sorts.The questions that have risen since its launch are:How well does it perform on a full-frame camera (D3X, D3, D700)? Or on the new APS-C sensor Nikon D7000?What is the difference in IQ (Image Quality) between this model and the more expensive Nikon Nikon AF-S Zoom-Nikkor 17-35mm f/2.8D IF-ED?DxOMark