| 摘要 |
PROBLEM TO BE SOLVED: To obtain a zoom lens capable of easily obtaining a wide field angle, a high zoom ratio and high optical performance over the entire zoom range.SOLUTION: There is provided a zoom lens which comprises, in order from an object side to an image side: a positive first lens group; a negative second lens group; a positive third lens group; and a positive fourth lens group, wherein the fourth lens group comprises: a 41th lens group having a positive refractive power; a 42th lens group having a negative refractive power; and a 43th lens group having a positive refractive power and appropriately sets a lateral magnification &bgr;3w of the third lens group at a wide angle end when focusing on an infinite object, a focal length f4 of the fourth lens, a lens configuration length Ld4 of fourth lens group, an air interval between the 41th lens group and the 42th lens group, an air interval between the 42th lens group and the 43th lens group, an Abbe number and an average value of a partial dispersion ratio of a material of a positive lens included in the 42th lens group, an Abbe number and an average value of a partial dispersion ratio of a material of a negative lens of the 42th lens group, or the like. |
