Patent ID: 8830592

Claim:
A zoom lens comprising, in order from an object side: a front lens group having negative refractive power; and a rear lens group having positive refractive power, the front lens group including, in order from the object side, an aspherical lens component Ga that has negative refractive power and a shape that the negative refractive power becomes smaller toward the periphery, and an aspherical lens component Gb that has positive refractive power and a shape that the positive refractive power turns to negative refractive power toward the periphery or has negative refractive power and a shape that the negative refractive becomes stronger toward the periphery, a distance between the front lens group and the rear lens group being varied thereby carrying out zooming from a wide-angle end state to a telephoto end state, the following conditional expression being satisfied: 0.0406≦(− Fa )/| Fb|< 0.650 where Fa denotes a focal length of the aspherical lens component Ga in the front lens group, and Fb denotes a focal length of the aspherical lens component Gb in the front lens group.