Made just for mirror less cameras is the new Rokinon 12mm T2.2 NCS CS Ultra Wide Angle Cine Lens. Its 35mm focal length equivalency for Samsung NX Mount Digital Cameras Is 18mm. With a T2.2 maximum aperture, it is particularly effective in low-light capture and can control shallow depth of field for precise subject focus with pleasing out-of-focus backgrounds. It offers a minimum focus distance of 7.9" and its front filter thread accepts 67mm size filters.. The lens's impressive optical construction consists of three Extra-low Dispersion elements, one aspherical, and one hybrid aspherical element. The nano-crystal coating is applied to the inner surface of the two front-most lens elements to minimize ghosting and flare and improve overall image clarity. As a lens designed for shooting HD video, it offers features that differentiate it from "photo lenses," which, of course, can also serve to shoot HDSLR video. However, Rokinon Cine lenses have a clickless aperture ring, which is not only silent but enables smooth transitions between stops and the ability to shoot between those stops. Furthermore, it relates aperture in T-stops (Transmission-stops) which is a more accurate measurement of the light entering the lens that actually makes its way to the image sensor and is a more consistent measurement from lens to lens. Additionally, a Cine lens features geared aperture and focus rings to enable the use of focus pull apparatus such as a follow focus system.