| 摘要 |
There is provided a zoom lens, including, in an order from an object side to an image side, a first lens group having a negative refractive power; a second lens group having a positive refractive power; a third lens group having a negative refractive power; and a fourth lens group having a positive refractive power. During power variation from a wide angle end to a telephoto end, each group is moved in an optical axis direction, and a following conditional expression (1) is satisfied: <?in-line-formulae description="In-line Formulae" end="lead"?>-5<f4/f1<-2.6, where: (1)<?in-line-formulae description="In-line Formulae" end="tail"?> f1 is a focal length of the first lens group; and f4 is a focal length of the fourth lens group.
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