Overview

The Sigma 70-200mm F2.8 EX DG OS HSM offers good value with solid build and effective optical stabilization, though autofocus accuracy and sharpness consistency can be problematic. DPReview praises its robust construction and smooth controls, while The-Digital-Picture reports significant front-focusing and uneven sharpness across the frame, requiring manual focus below 135mm. Focus Review notes fast AF but occasional hunting in low light. Benjamin Lehman highlights excellent sharpness at f/2.8 with OS on. It suits budget-conscious users needing a fast telezoom, but those requiring reliable AF may prefer alternatives.