Overview

The Sigma 300mm F2.8 APO EX DG HSM offers a fast f/2.8 aperture suitable for low-light sports and wildlife, with good central sharpness wide open but corner softness on full-frame. Build quality is robust with a smooth focusing ring and well-engineered tripod collar, though the lens is heavy at over 5 lbs, requiring a tripod for extended use. Optical performance is very good but not tack-sharp, with minimal improvement when stopped down. It suits budget-conscious users needing a fast telephoto, but lacks image stabilization.