Rokinon 12mm F2.0 NCS CS Ultra Wide Angle Lens Sony E-Mount (NEX) (Black)  (RK12M-E) Nano Crystal Coating System (NCS) for increased light transmission and reduced internal reflections Aperture range f2.0-22, Ultra Wide 12mm Fixed Focal Length, minimum focusing distance of 7.9 inches Optimized for excellent optical quality and true ultra-wide 110 degree edge to edge coverage with APS-C sensor digital cameras Utilizes 3 high precision (2 Aspherical + 1 ED) lens elements for superior image quality Built for Mirrorless cameras, takes a 67mm filter size. Focus type : Manual Focus