| 摘要 |
A zoom lens comprising, in order from an object side to an image side, a first lens unit having a negative refractive power, a second lens unit having a positive refractive power, and a third lens unit having a positive refractive power. The second and third lens units are configured to move in an optical axis direction for a magnification variation, and the first lens unit is configured to move in the optical axis direction to reduce an image-plane fluctuation associated with the magnification variation. Expressions -0.83@f1/f2@-0.40 and -4.6@f1/fw@-2.5 T are satisfied where f1 is a focal length of the first lens unit, f2 is a focal length of the second lens unit, and fw is a focal length of the entire zoom lens at a wide angle end.
|
