The Samyang 16mm Ultra Wide Angle F/2.0 Aspherical Lens is a great addition to Samyangs assortment of high quality, affordable, prime lenses. The 16mm lens is designed for cameras with APS-C crop frame sensors. Its build and construction are superb! The lens is constructed of 13 elements in 11 groups and features 2 aspherical lens elements. All of these lens elements combine to minimize distortion and chromatic aberrations. The lens also features a removable hood and takes a 77mm filter. Your pictures are sure to come out razor sharp and clear, even at the corners! The Samyang 16mm lens features a remarkable 83.1-Degree angle of view on APS-C cameras and 67.6-Degree on 4/3 cameras.