Rokinon 12mm F2.0 NCS CS Ultra Wide Angle Lens for Samsung NX Mount Digital Cameras (Black) (RK12M-NX) Ultra Wide 12mm Fixed Focal Length; Includes removable lens hood, lens caps, lens pouch and 1 year Rokinon warranty Aperture range f2.0-22 Constructed of 12 elements in 10 groups (2 aspherical lenses) Minimum focusing distance of only 8 inches Built for Mirror less cameras; takes a 67mm filter size