| 摘要 |
PROBLEM TO BE SOLVED: To obtain a zoom lens with a vibration preventing function capable of correcting the blurring of a photographed image due to a vibration while maintaining a satisfactory optical performance, and to provide optical equipment using the zoom lens. SOLUTION: As for the zoom lens provided with a 1st lens group having a positive refractive power, a 2nd lens group having a negative refractive power, a 3rd lens group having a positive refractive power, a 4th lens group having a negative refractive power and a 5th lens group having a positive refractive power in this order from an object side, at varying the power from a wide angle end to a telephoto end, the prescribed lens groups are moved so that a distance between the 1st lens group and the 2nd lens group may become longer, a distance between the 2nd lens group and the 3rd lens group may become shorter, a distance between the 3rd lens group and the 4th lens group may become longer, and a distance between the 4th lens group and the 5th lens group may become shorter. The image blurring caused by the vibration of the zoom lens is corrected by moving at least a part of the 4th lens group in a direction nearly perpendicular to the optical axis direction. |
