Taking lens system and image pickup apparatus using the same

摘要

A taking lens system comprises a frontmost lens unit, a rearmost lens unit, and a plurality of lens units arranged between the frontmost lens unit and the rearmost lens unit. One of the plurality of lens units is a first focusing lens unit. During focusing from an infinite object distance to a close object distance, only the first focusing lens unit moves toward the image side in a first shooting mode, and at least two lens units in the taking lens system move in a second shooting mode. In the state in which the taking lens system is focused on an object at infinity, the positions of the first focusing lens unit and at least one lens unit in the taking lens system in the first shooting mode are different from those in the second shooting mode. The taking lens system satisfies the condition Mn1>Mn2.

主权项

1. A taking lens system comprising:
a frontmost lens unit that is arranged closest to the object side; a rearmost lens unit that is arranged closest to the image side; and a plurality of lens units that are arranged between the frontmost lens unit and the rearmost lens unit, wherein one of the plurality of lens units is a first focusing lens unit; in a first shooting mode, only the first focusing lens unit moves toward the image side during focusing from an infinite object distance to a close object distance; in a second shooting mode, at least two lens units in the taking lens system move during focusing from an infinite object distance to a close object distance; in the state in which the taking lens system is focused on an object at infinity, the positions of the first focusing lens unit and at least one lens unit in the taking lens system in the first shooting mode are different from those in the second shooting mode, and Mn1>Mn2 is satisfied,where Mn1 is the distance between the first focusing lens unit and the image plane in the first shooting mode, and
Mn2 is the distance between the first focusing lens unit and the image plane in the second shooting mode, both in the state in which the taking lens system is focused on an object at infinity.