| 摘要 |
<p>A zoom lens capable of image stabilization is provided and includes: in order from the object side, a positive first group (G 1 ) fixed in variable magnification, a negative second group (G 2 ) having a variable magnification function, a positive third group (G 3 ) fixed in variable magnification, and a positive fourth group (G 4 ) having a correction function for an image plane (1) variation depending upon variable magnification and a focusing function. In the third group (G 3 ), there are arranged a positive 3a-th group (3a), a negative 3b-th group (3b), and a positive 3c-th group (3c) in this order from the object side. Blurring of a taken image caused by a vibration of this variable magnification optical system is corrected by moving the 3b-th group in a direction approximately orthogonal to the optical axis. Further, a specific conditional expression relating to power of the third group and a specific conditional expression relating to a power distribution of lens groups of the third group (G 3 ) are satisfied.</p> |
