| 摘要 |
PROBLEM TO BE SOLVED: To provide a zoom lens that has a high zoom ratio and a small entire system having excellent optical performance over an entire zoom range.SOLUTION: A zoom lens comprises, in order from an object side to an image side, first through fifth lens groups having positive, negative, positive, positive, and positive or negative refractive power, respectively. When zooming, the first lens group and the fifth lens group do not move, and the second lens group and the fourth lens group move. The second leng group has three or more negative lenses and two or more positive lenses that are in order from the object side to the image side, the negative lens, the positive lens Gp1 having a concave and meniscus-shaped surface facing the object side, and the negative lens. The zoom lens appropriately and individually sets a focal distance fw of an entire system at a wide angle end, a focal distance f2 of the second lens group, a focal distance fp1 of the positive lens Gp1, and a focal distance fp2 of a positive lens Gp2 which is located second from the object side of the second lens group. |
