Overview

The Sigma 50-200mm F4-5.6 DC OS HSM is a budget telephoto zoom for APS-C DSLRs, offering optical stabilization and a Hyper-Sonic Motor for quiet autofocus. Optical strengths include good sharpness at 50-100mm, but it suffers from de-centering and soft corners, especially beyond 100mm. Chromatic aberration is notable at 50mm but negligible in real-world use. Build is compact with a rotating focus ring, though the hood protects it. It suits budget-conscious users needing a versatile telephoto range for general photography, but not demanding sharpness or wide apertures.