Patent ID: 8284275
Filing Date: 2012-10-09
Classification: H04N

Abstract:
1. A lens barrel comprising: a correction lens operable to move along an optical axis to perform zoom tracking; a correction lens driver operable to drive the correction lens; a zoom lens; a zoom ring operable to be turned by a user; a zoom lens driver operable to mechanically move the zoom lens according to an amount of turn of the zoom ring; a position detector operable to detect a position of the zoom lens; a rate detector operable to detect a change rate of the position of the zoom lens; a storage unit operable to store relational information which associates the position of the zoom lens with a focus position of the correction lens; and a controller operable to control the correction lens driver, wherein the controller determines a focus position of the correction lens corresponding to a position more distant by a predetermined amount from the position of the zoom lens detected by the position detector, by referring to the relational information, and controls the correction lens driver to drive the correction lens with a target position set to the determined focus position, and the controller changes the predetermined amount according to the change rate of the position of the zoom lens detected by the rate detector.