The Samyang 20mm T1.9 for Nikon is a manual focus VDSLR wide angle lens for full frame or APS-C sensor cameras. The wide aperture makes focusing easy in low light and enables backgrounds to be thrown out of focus. Excellent optical performance is assured with Samyang's Ultra Multi Coating and two aspherical and three extra-low dispersion lens elements. Focus and aperture rings operate smoothly and quietly. A petal shaped hood to provide optimum shading is included.