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 a positive refractive power, a second lens unit having a negative refractive power, a third lens unit having a positive refractive power, and a fourth lens unit having a positive refractive power. Each lens unit moves so that a distance between adjacent lens units changes during zooming. The third lens unit includes a positive lens G3i closest to the image side which has a concave meniscus surface on an image side. A conditional expression 0.03

主权项

1. A zoom lens comprising, in order from an object side to an image side:
a first lens unit having a positive refractive power; a second lens unit having a negative refractive power; a third lens unit having a positive refractive power; and a fourth lens unit having a positive refractive power, wherein each lens unit moves so that a distance between adjacent lens units changes during zooming, wherein the third lens unit includes a plurality of lenses, including a positive meniscus lens G3i having a concave surface, wherein the positive meniscus lens G3i, among all of the lenses included in the third lens unit, is disposed closest to the image side, and with the concave surface thereof disposed closest to the image side, and wherein the following conditional expressions are satisfied:
0.03