The Rokinon 14mm f/2.8 AE IF AS ED UMC lens is the highest quality affordably priced 14mm lens on the market. Designed for full frame cameras and is fully compatible with APS-C cameras. Its build and construction are superb. The lens construction is 14 elements in 10 groups and features 2 ED lens elements, one hybrid aspherical lens element and one glass aspherical lens element. All of these lens elements combine to minimize distortion and chromatic aberrations. Results are razor sharp and clear images, even at the corners.