| 摘要 |
PROBLEM TO BE SOLVED: To provide a television lens that allows a stable behavior to shield light without increasing an entire lens length and a weight.SOLUTION: A zoom lens has: a lens barrel; and a plurality of optical groups that moves in an optical axis relative to the lens barrel, in which, the lens barrel, a linear groove is provided that regulates a rotation of each optical group, and allows the optical group to slide in the optical axis, and in the lens barrel, a cam member is provided that includes a cam groove for regulating a curve cam follower provided in each optical group, and in the optical group, provided is a notch for avoiding interference with a lens barrel of other optical group. The zoom lens has a light shielding member that shields the notch to move in the optical axis, in which in the cam member, provided is a cam groove for regulating a curve cam follower provided in the light shielding member, and the curve cam follower of the light shielding member gets out of the cam member on a wide-angle side.SELECTED DRAWING: Figure 1 |
