| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a compact zoom lens with a vibration-proofing function which is composed of two lens groups, simple in lens constitution, and small in the total number of lens elements. SOLUTION: The zoom lens has a 1st lens group with positive refracting power and a 2nd lens group with negative refracting power in order from the object side and varies the power by varying the air gap between the groups; and the 1st lens group has lens groups 1a, 1b, and 1c in order from the object side and corrects an image blur in case of the vibration of the zoom lens by moving the lens group 1b at right angles to the optical axis and the lens group 1a is larger in the number of lenses than the lens group 1c.</p> |
