| 摘要 |
A zoom lens comprises first, second, third and fourth lens groups in order from an object side, so as to change magnification by changing a spacing between the lens groups. The first lens group has a positive refractive power as a whole and comprises, in order from the object side, a negative meniscus lens, a reflecting member that bends an optical path nearly 90 degrees and a positive lens of a resin material having at least one aspheric surface. The second lens group has a negative refractive power as a whole and comprises a negative lens of a resin material on an most object side of the second lens group. A conditional expression given below is satisfied provided that P 1 is a focal length of the positive lens of the resin material in the first lens group, and P 2 is a focal length of the negative lens of the resin material in the second lens group. <?in-line-formulae description="In-line Formulae" end="lead"?>1.0<|P1/P2|<3.0 (1)<?in-line-formulae description="In-line Formulae" end="tail"?>
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