Its 35mm focal length equivalency for Sony E- Mount (NEX) Cameras is 18mm. With an f2.0 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 Made just for mirrorless cameras is the new Samyang 12mm f2.0 NCS CS Ultra Wide Angle Lens. Its 35mm focal length equivalency for Sony E- Mount (NEX) Cameras is 18mm. With a f2.0 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.