Patent ID: 6219098
Filing Date: 2001-04-17
Classification: H04N

Abstract:
A TV camera lens which moves a master lens group, arranged in a lens mount of a lens body, forward and backward along an optical axis in accordance with operation of either one of first and second external operating members, so as t adjust a flange back length and set an optical system for macro-shooting, said TV camber lens comprising:a flange back length controller for outputting a first electric signal instructing said master lens group to move in accordance with an operating amount of said first external operating member for adjusting the flange back length;a macro-shooting controller for outputting a second electric signal instructing said master lens group to move in accordance with an operating amount of said second external operating member for setting of the macro-shooting;switching means for selectively validating one of said flange back length controller and said macro-shooting controller;driving means for driving said master lens group; andcontrol means for outputting a drive signal to said driving means to drive said master lens group in accordance with the one of said first and second electric signals output from the one of said flange back length controller and said macro-shooting controller which is selectively validated by said switching means, said master lens group being moved by said drive means to a position determined by said back flange controller whenever said flange back length controller is selectively validated by said switching means, and said master lens group being returned from a position to which it was adjusted by said macro-shooting controller to the flange back length position previously determined by the back flange controller when said flange length controller is re-validated after a selective validation of the macro-shooting controller.