Samsung Electronics EX-YN927ZZASUS NX-M 9-27mm F3.5-5.6 ED OIS Lens for Samsung NX-M Cameras (Black) 9-27mm (equivalent to 24.3-72.9mm in 35mm format) 9 elements in 8 groups (2 Aspherical lens, 1 Extra-low Dispersion lens) Aperture - F3.5 - 5.6 (Min. F11), (Number of Blades : 7 , Circular Aperture Diaphragm)