Much bigger than most lenses, and at more than twice the weight of some, the Tokina AT-X 16-28mm f/2.8 PRO FX is a chunky lens. That's because while other lenses are designed solely for use on cameras with APS-C or Four Thirds sensors, the Tokina is fully compatible with full-frame cameras.
Compatible with full-frame cameras; Autofocus using Tokina's new 'silent' DC motor is fast; quiet and accurate
No image stabilisation; No filter thread