| 摘要 |
<p>A zoom lens, an optical apparatus including the same, and a magnifying method thereof are provided to improve control a focus point for imaging performance by moving a lens group proximate to the image side to an optical axis. A first lens group(G1) has a positive refractive index. A second lens group(G2) has a negative refractive lens. A third lens group(G3) has the positive refractive lens. A fourth lens group(G4) has the positive refractive index. A fifth lens group(G5) has a positive lens group. A focal distance is changed from a wide angle state to a telephotographic state. The interval between the second lens group and the first lens group is increased. The interval between the second lens group and the third lens group is decreased. The interval between the third lens group and the fourth lens group is decreased. The interval between the fourth lens group and the fifth lens group is increased. The fifth lens group includes a front lens group and a rear lens group.</p> |
