Tamron SP AF 17-50mm f2.8 XR DiII VC LD Aspherical [IF] with Nikon mount - Model B005. This is a very useful lens for portraits, family photos and general work. It is f2.8 across the whole zoom range. It is in excellent condition. The sale includes front and rear lens caps, lens hood and UV filter (Hoya Super Pro 1). The full specifications of the lens can be found on the Tamron website, url provided below.