| 摘要 |
PROBLEM TO BE SOLVED: To obtain a zoom lens and optical equipment using the zoom lens constituted, so that a static image can be obtained by optically correcting the blur of a photographic image, caused when the zoom lens is vibrated. SOLUTION: This zoom lens is provided with a 1st lens group having negative refractive power, a 2nd lens group having positive refractive power, a 3rd lens group having positive refractive power and a 4th lens group having negative refractive power in the order starting from the object side. In the case of zooming from a wide-angle end to a telephoto end, the respective lens groups are moved on an optical axis, so that the space between the 1st and the 2nd lens groups becomes wide, the space between the 2nd and the 3rd lens groups becomes wide, and space between the 3rd and the 4th lens groups becomes narrow. A lens group which is a part of the 2nd lens group and having positive refractive power is moved, so as to have a component in the direction perpendicular to an optical axis, so that an image-forming position is displaced. |
