Samsung NX-M 9mm F3.5 ED Lens 9mm (equivalent to 24.3mm in 35mm format) 6 elements in 5 groups (1 Aspherical lens, 1 Extra-low Dispersion lens, 1 Xtreme High Refractive lens) Aperture - F3.5 (Min. F13), (Number of Blades : 5 , Circular Aperture Diaphragm)