Zoom lens and image pickup apparatus having the same

摘要

A zoom lens includes, in order from an object side to an image side, a first lens unit having positive refractive power, a second lens unit having negative refractive power, a reflecting unit for bending an optical path, and a rear lens group including two or more lens units, wherein, during zooming, the first and second lens units are moved and the reflecting unit is not moved, and wherein an amount of movement of the first lens unit during zooming from a wide-angle end to a telephoto end, a distance on an optical axis from a reflecting surface of the reflecting unit to an image plane, a distance on the optical axis from a lens surface of the second lens unit closest to the image side to the reflection surface of the reflecting unit at the wide-angle end, and a focal length of the second lens unit are appropriately set.

主权项

1. A zoom lens comprising, in order from an object side to an image side:
a first lens unit having positive refractive power; a second lens unit having negative refractive power; a reflecting unit for bending an optical path; and a rear lens group including two or more lens units, wherein, during zooming, the first lens unit and the second lens unit are moved and the reflecting unit is not moved, and wherein the following conditions are satisfied:
0.42<(d2w−X1)/DR<1.000.50<|X1|/d2w<5.000.36<|f2|/d2w<3.00, where an amount of movement of the first lens unit during zooming from a wide-angle end to a telephoto end is X1, a distance from a reflection surface of the reflecting unit to an image plane on an optical axis is DR, a distance on the optical axis from a lens surface of the second lens unit closest to the image side to the reflection surface of the reflecting unit at the wide-angle end is d2w, and a focal length of the second lens unit is f2.