| 摘要 |
A zoom lens includes, in order from an object side to an image side: a first lens group that has a positive refractive power; a second lens group that has a negative refractive power; and a third lens group that has a positive refractive power, wherein the second lens group is constituted by three lenses of a first negative lens, a second negative lens, and a positive lens which are arranged in order from the object side to the image side, wherein an aspheric surface is formed on at least an object side of the positive lens in a shape of which a curvature gradually decreases as an outer periphery of the lens gets closer from an optical axis, and wherein the following Conditional Expressions (1) and (2) are satisfied: 0.8<10×(R22r−R23f)/(R22r+R23f)<1.8  (1) 3.0<100×{D(2,23)/TH2}<7.0.  (2) |
