Overview

The Tokina AT-X AF 400 mm f/5.6 SD is a compact super-telephoto prime with low dispersion glass to reduce chromatic aberration. It is fairly light and easy to handhold, though a monopod is recommended for steady shots. Optically, it performs decently wide open and improves when stopped down to f/8 for sharpness, but suffers from significant purple fringing in high-contrast areas. The lens features a built-in metal hood and is suited for photographers seeking an affordable, portable 400mm option, especially on APS-C where it becomes a 600mm equivalent.