Patent ID: 8964099
Filing Date: 2015-02-24
Classification: G02B,G03B,H04N

Abstract:
1. A lens device to be mounted on a first camera including a view finder with an AF-frame display function or a second camera including a view finder without the AF-frame display function, the lens device comprising: an autofocus unit configured to control a focus of an imaging optical system so that, based on a video signal inputted from a camera mounted on the lens device, a subject in an AF frame set in an imaging area by the camera is brought into focus; a mode setting unit capable of setting a manual operation mode of manually setting the AF frame or an automatic tracking mode of automatically setting the AF frame; a subject detecting unit configured to detect a tracking target subject in the imaging range imaged by the camera when the automatic tracking mode is set by the mode setting unit; an AF-frame automatic tracking unit configured to set a predetermined range including the tracking target subject detected by the subject detecting unit as an AF frame for focusing by the autofocus unit; a camera information obtaining unit configured to obtain camera information indicating whether the camera having the lens device mounted thereon is the first camera or the second camera; and an AF-frame fixing/fixing-cancelling unit configured to changeably set a position and size of the AF frame when the camera information indicating the first camera is obtained by the camera information obtaining unit and when the camera information indicating the second camera is obtained and the automatic tracking mode is set, the AF-frame fixing/fixing-cancelling unit configured to fix the AF frame at a predetermined position and size when the camera information indicating the second camera is obtained and the automatic tracking mode is not set.