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The Sigma 2470mm F28 DG OS HSM Art is a budget take on the 2470mm design, but falls short of the marks we look for in a pro lens MSRP $1, $1, at Amazon PCMag editors select andWhile the Sigma 2470mm f/28 DG OS HSM A is good performer and represents good value overall, it's not quite what we expected from an Art series lens Still, it has relatively uniform sharpness across the frame over all focal lengths, while levels of chromatic aberration, distortion, and vignetting are all wellcontrolled for this type of lensOn paper, the Sigma 2470mm F28 IF EX DG HSM ($9 direct) ($900 at Amazon) is an appealing alternative to similar fullframe zoom lenses Available for Sigma, Sony, Pentax, Canon, and Nikon Sigma 24 70mm F 2 8 Dg Os Hsm Art Lens For Canon Ef With Aom Starter Kit Sigma 24-70mm f2.8 dg os hsm of art lens for canon ef