Patent ID: 6940655

Claim:
A super wide-angle zoom lens system comprising, in order from an object: a first lens group having negative refractive power; and a second lens group having positive refractive power; zooming being carried out by varying a distance between the first lens group and the second lens group; the first lens group having a negative lens component; and a positive lens component; the most image side surface of the negative lens component and the most object side surface of the positive lens component are separated by air; the negative lens component having at least one aspherical lens; the aspherical lens satisfying the following conditional expressions; 2.0 <d max /d 0 <4.49 0.6<(| R max|−| R min|)/| R max|<1.0 0.5 <d 12 / ft <1.5 where d 0 denotes the thickness of the aspherical lens along the optical axis, dmax denotes the thickness of the aspherical lens at the maximum effective aperture measured parallel to the optical axis, Rmax denotes the radius of curvature of the aspherical lens on the side having larger absolute value of the paraxial radius of curvature, Rmin denotes the radius of curvature of the aspherical lens on the side having smaller absolute value of the paraxial radius of curvature, d 12 denotes a distance along the optical axis between the most image side surface of the aspherical lens and the most object side of a lens immediately after the aspherical lens, and ft denotes the focal length of the zoom lens system in a telephoto end state.