The SIGMA 14-24mm F2.8 DG DN | Art lens attains edge-to-edge sharpness, no easy task when it comes to the complex optical formulas that a superior wide zoom requires. The result is impressive resolution that suppresses chromatic aberrations and minimizes flare, plus there is a newly developed Nano Porous Coating that minimizes the effects of strong incident light. A water and oil repellent coating on the front element ensures that the lens can be used in even the most challenging environments.