* Prime Wide-angle Perspective—Ultra-fast f/1.4 Aperture Natural wide angle of view, with extreme light gathering capability, delivers extraordinary performance, meeting a broad range of challenging assignments. * Nano Crystal Coat Further reduces ghosting and internal flare across a wide range of wavelengths for even greater image clarity. * 2 Extra-low Dispersion (ED) elements Offers superior sharpness and color correction by effectively minimizing chromatic aberration, even at the widest aperture settings. * 2 Aspherical Lens Elements Aspherical lens elements virtually eliminate coma and other types of aberration, even when shooting at the widest available aperture. * Rear Focus (RF) Provides smooth and fast autofocus while eliminating front barrel rotation and lens length changes. * Exclusive Nikon Silent Wave Motor (SWM) Enables fast, accurate and quiet autofocus. * M/A Focus Mode Switch Enables quick changes between manual and autofocus operation. * Rounded 9-Blade Diaphragm Renders more natural appearance of out-of-focus image elements.