Sigma continues to impress me with their updated versions of pro and semi-pro lense for D-SLRs. They provide excellent value with pricing below the Nikon and Canon versions while not sacrificing image quality. Their new 24-70mm f/2.8 full frame HSM (same as USM or AF-S) is no exception...

Read More: Sigma 24-70, Another "Pro Value" Champ from Sigma