Zoom lens and image pickup apparatus including the same

摘要

Provided is a zoom lens including, in order from an object side to an image side: a first lens unit having a positive refractive power which does not move for zooming; a second lens unit having a negative refractive power which moves during zooming; and an N-th lens unit having a positive refractive power which does not move for zooming and is arranged closest to the image side. In the zoom lens, the N-th lens unit includes in order from an object side: a first sub-lens unit; and a second sub-lens unit which is movable, and a lateral magnification at a wide angle end of the N-th lens unit and a lateral magnification at a wide angle end of the second sub-lens unit of the N-th lens unit when an axial ray enters from infinity in a state in which focus is at the infinity 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 a positive refractive power which does not move for zooming; a second lens unit having a negative refractive power which moves during zooming; and an N-th lens unit having a positive refractive power which does not move for zooming and is arranged closest to the image side, wherein the N-th lens unit comprises, in order from an object side to an image side:
a first sub-lens unit; anda second sub-lens unit configured to be able to move in an optical axis direction, and wherein the following conditional expressions are satisfied:
−2.70<βnw<−1.45; and0<βn2<0.75,where βnw represents a lateral magnification at a wide angle end of the N-th lens unit and βn2 represents a lateral magnification at a wide angle end of the second sub-lens unit when an axial ray enters from infinity in a state in which focus is at the infinity.