| 摘要 |
PROBLEM TO BE SOLVED: To provide a high magnification zoom lens having light total weight and having, among others, a focusing group lens system whose weight is reduced to lessen a load on a focus drive system, and an anti-shake lens system whose diameter and weight are reduced to lessen a load on an anti-shake drive system, making the anti-shake drive system more compact thereby.SOLUTION: A high magnification zoom lens comprises, in order from an object side, a first lens group having positive refractive power, a second lens group having negative refractive power, a third lens group having positive refractive power, a fourth lens group having negative refractive power, and a fifth lens group. The first lens group includes a single lens having negative refractive power, and the second lens group comprises, in order from the object side, a lens having negative refractive power, a lens having negative refractive power, a lens having positive refractive power, and a lens having negative refractive power. Focusing from infinity to an object at a short distance is done by moving the fourth lens group toward an image side. The third lens group includes a cemented lens whose bonding surface acts as a divergent surface. The high magnification zoom lens satisfies a predetermined conditional expression. |
