| 摘要 |
A zoom lens includes a first lens unit having a positive refractive power, a second lens unit having a negative refractive power and configured to move during a zooming operation, a third lens unit having a positive refractive power, and a fourth lens unit having a positive refractive power and configured to move during a zooming operation. The first lens unit has a negative lens closest to an object side, and includes at least five lenses. |
