| 摘要 |
In a vibration proof zoom lens 100, a third lens group G3 has a positive lens 7, a positive cemented lens 8, a negative cemented lens 9, which are arranged in order from an object side. In variable-magnifying from a wide angle limit to a telephoto limit, a clearance between a first lens group G1 and a second lens group G2 is increased and at the same time, a clearance between the second lens group G2 and a third lens groupG3 is decreased, a focusing from an infinity side to a close side is performed by moving the positive lens 7 toward an image, and a vibration proof is performed by moving the cemented lens 9 in a direction perpendicular to an optical axis to change an image position. |
