Patent ID: 8687284

Claim:
A lens apparatus comprising: an image pickup optical system including a focus lens and a zoom lens; a focus detector that detects a focus state of the image pickup optical system; and a controller that controls a driving of the focus lens, wherein the controller calculates a driving amount necessary to drive the focus lens to a focus position based on a defocus amount derived based the focus state detected by the focus detector, wherein the controller controls a driving speed of the focus lens based on the derived defocus amount and the calculated driving amount, wherein the controller, in a case where the derived defocus amount is equal to or larger than a predetermined defocus amount or the calculated driving amount is equal to or larger than a predetermined driving amount, drives the focus lens at a first driving speed, wherein the controller, in a case where the derived defocus amount is smaller than the predetermined defocus amount and the calculated driving amount is smaller than the predetermined driving amount, drives the focus lens at a second driving speed, and wherein the second driving speed is lower than the first driving speed.