Patent ID: 8872945

Claim:
A zoom lens, comprising: a first lens group having a positive refracting power; a second lens group having a negative refracting power; a third lens group having a positive refracting power; a fourth lens group having a positive refracting power; and a fifth lens group having a positive refracting power, and being a plurality of sub lens groups, the first lens group, the second lens group, the third lens group, the fourth lens group, and the fifth lens group being arranged in recited order from an object plane, wherein the third lens group serves as a first compensation lens group, and one or more of the plurality of sub lens groups serves as a second compensation lens group, and each of the first compensation lens group and the second compensation lens group independently shifts in a direction perpendicular to a light axis to allow an image formed on an image plane to be shifted in the direction perpendicular to the light axis, wherein each of the first compensation lens group and the second compensation lens group independently shifts in the direction perpendicular to the light axis at a wide-angle end to allow the following conditional expression (1) to be satisfied: 0<{(1−β3 w )β3 wr×D 3 w }/{(1−β5 w )β5 wr×D 5 w}< 1 (1), where, at the wide-angle end, β 3 w is a lateral magnification of the first compensation lens group, β 3 wr is a lateral magnification, as a whole, of a lens groups located between the first compensation lens group and the image plane, D 3 w is a shift distance of the first compensation lens group in the direction perpendicular to the light axis, β 5 w is a lateral magnification of the second compensation lens group, β 5 wr is a lateral magnification, as a whole, of one or more of sub lens groups located between the second compensation lens group and the image plane, and D 5 w is a shift distance of the second compensation lens group in the direction perpendicular to the light axis.