The world's smallest and lightest F2.8 tele-zoom lens fits comfortably in your handThe 70-180mm F/2.8 Di Iii Vc Vxd G2 (Model A065) is the ""G2"" 2nd-generation successor to the 70-180mm F/2.8 Di Iii Vxd (Model A056), a lens that won astounding acclaim from the marketplace and has been enjoyed by users around the world. The new model keeps its fast F2.8 aperture, while being newly equipped with Tamron's proprietary Vc (Vibration Compensation) and offering greatly improved close-up capability.Even with these new features, the lens is the world's smallest size and lightest weight for its class (156.5mm / 6.2in long at wide 70mm end) and weighs just 855g / 30.2oz as a result of its size-minimizing 180mm focal length at the tele end versus bulkier 70-200mm lenses. In addition to offering the highest level of mobility, the optical design has been completely revamped from the 1st-generation model to further refine its exceptional optical performance. With the 70-180mm F2.