The anti-reflective multi-layer coating improves light transmission and minimises reflections, while the water-repellent coating makes it easy to wipe and clean the surface of the front glass element. True to tradition, Tokina has incorporated many metal parts into the lens to ensure reliable quality and long service life under a variety of shooting conditions. The sophisticated exterior design has been specially developed to match the design of modern DSLR cameras. Precise attention has also been paid to zoom and focus ring rotation, which features comfortable handling with no play and just enough strong damping. The Tokina atx-i 11-16mm F2.8 CF for Nikon F Mount features an internal silent focusing motor combined with a precise GMR sensor, allowing the lens to focus AF even on Nikon bodies without an AF drive gear and motor. The high-quality one-touch focus clutch mechanism allows easy switching between autofocus and manual focus. The overall length of the Tokina atx-i 11-16mm F2.8 CF does not change when focusing or zooming, thanks to the internal nature of the focus construction.