| 摘要 |
PROBLEM TO BE SOLVED: To obtain a compact zoom lens which has four lens groups as a whole and in which chromatic aberration associated with the variable power is corrected well by using one diffraction optical element in at least one lens group. SOLUTION: In this zoom lens constituted of the four lens groups of a first group L1 having negative refracting power, a second group L2 having positive refracting power, a third group L3 having the positive refracting power, and a fourth groups L4 having the positive refracting power from an object side, and performing variable power by varying a distance between the groups L1 and L2, a distance between the groups L2 and L3, and a distance between the groups L3 and L4; at least the one of a diffraction optical element is provided on any of the lens groups from the group L1 to the group 14.
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