Sigma 24-70mm f/2.8 DG OS HSM Art vs Nikon AF-S DX 17-55mm f/2.8G

The Sigma 24-70mm f/2.8 DG OS HSM Art is the stronger general-purpose zoom: it covers full-frame bodies, adds optical stabilization, and its Art-series optics are widely praised for sharpness. The Nikon 17-55mm f/2.8G is a DX-only lens built for crop-sensor Nikon bodies, and it is a solid, fast standard zoom with a rugged build, but it lacks stabilization and full-frame coverage. Buy the Sigma for full-frame work and low light; buy the Nikon only if you shoot DX and want the native 17-55mm range.

• Choose the Sigma 24-70mm f/2.8 DG OS HSM Art if you shoot a full-frame Canon EF or Nikon F body and want a stabilized, sharp standard zoom for events, portraits and low light.
• Choose the Nikon AF-S DX 17-55mm f/2.8G if you shoot a Nikon DX body and want a fast native zoom that covers a wider wide-angle end without an adapter.