| 摘要 |
<p>A zoom lens (ZL) comprises the following lens groups in the order from the object side: a first lens group (G1) having positive power; a second lens group (G2) having negative power; a third lens group (G3) having positive power; and a fourth lens group (G4) having positive power; wherein, upon zooming, at least the first lens group (G1) and the fourth lens group (G4) move to the object side; and wherein, upon focusing, the fourth lens group (G4) comprises a front lens group (G4F), and a rear lens group (G4R) arranged with an air space on an image side of the front lens group (G4F), and the rear lens group (G4R) is moved along the optical axis of the zoom lens, the front lens group (G4F) remaining stationary with respect to the image during focusing.</p> |
