| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a zoom lens that satisfactorily corrects an aberration change during image blur correction despite its small entire size and high zoom ratio and that obtains high optical performance even in vibration insulation. <P>SOLUTION: The zoom lens comprises, in order from an object side to an image side: a first lens group of positive refractive power; a second lens group of negative refractive power; a third lens group of positive refractive power; a fourth lens group of positive refractive power, and a fifth lens group of positive or negative refractive power. The second and fourth lens groups move for zooming, an interval between the first and second lens groups increases at a telephoto end compared to that at a wide angle end. In the zoom lens, the fifth lens group has a lens group L5n of negative refractive power, which changes an imaging position by moving so as to have a component in a direction perpendicular to an optical axis. If the imaging lateral magnification of the lens group L5n is β5n, and the imaging lateral magnification of a lens group L5p of positive refractive power located closer to the image side than the lens group L5n is β5p, a condition expressed by 0.5<¾(1-β5n)×β5p¾<2.0 is satisfied. <P>COPYRIGHT: (C)2013,JPO&INPIT |
