| 摘要 |
PROBLEM TO BE SOLVED: To provide a zoom lens which offers a wide view angle, little eccentric aberration caused by anti-shake motion, easy high-speed focusing, and little variation of aberrations during focusing.SOLUTION: A zoom lens includes a first lens group having negative refractive power, a second lens group having positive refractive power, a third lens group having negative refractive power, and a rear group which includes a plurality of lens groups and has positive refractive power as a whole arranged in an order from the object side to the image side, where four or more lens groups are set to move when zooming. The third lens group has an anti-shake group which moves an image forming position in a direction perpendicular to the optical axis by moving itself in a direction having a component perpendicular to the optical axis, and the rear group has a focusing group. A focal length fis of the anti-shake group of the third lens group and a focal length fR of the rear group at the telephoto end are set appropriately to satisfy a conditional expression below. |
