| 摘要 |
PROBLEM TO BE SOLVED: To provide a counter weight device of a television lens device for appropriately reducing vibration which occurs when a plurality of mobile lens groups move at the same time.SOLUTION: A weight 84 of a counter weight device is moved such that a variation in a center-of-gravity position does not occur with respect to the movement of each of a variable power lens group 44 and a correction lens group 46 as zoom lens groups of a television lens device. When the movement amount of the variable power lens group 44 with a weight WA is expressed with &Dgr;XA, and the movement amount of the correction lens group 46 with a weight WB is expressed with &Dgr;XB, the weight 84 with a weight WC is moved to a position where the movement amount expressed with &Dgr;XC=-(&Dgr;XA×WA+&Dgr;XB×WB)/WC is obtained. |
