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