Overview

The Sigma AF 70-210 mm f/2.8 Zoom APO (I) is a fast telephoto zoom with constant aperture, offering good sharpness in the center but softer corners, especially at wider apertures. Chromatic aberration and flare can be issues, though contrast is decent. Build quality is solid with a metal barrel and smooth zoom ring, but the lens is heavy and lacks image stabilization. It suits photographers needing a fast, affordable telezoom on a budget, particularly on APS-C bodies where corner softness is less noticeable.