Nikon AF-S DX Nikkor 17-55mm f/2.8G ED-IF

An standard zoom for Nikon's APS-C DX format DSLRs, the 17-55mm F2.8 covers an equivalent focal length range of 25-82mm, and offers a constant maximum aperture of F2.8. Its ring-type SWM focus motor means that AF is fast and silent. Designed for use on Nikon's early professional DSLRs, the dust and moisture-sealed 17-55mm F2.8 is outclassed optically by newer lenses like the (admittedly slower) AF-S Nikkor 16-35mm F4 VR, but remains a decent performer and one of the most solid lenses in Nikon's DX lineup.