Patent ID: 7050244

Claim:
A zoom lens barrel comprising: a first frame; a second frame rotating relatively to the first frame; a third frame moved in an optical axis direction by the rotation of the second frame; a fourth frame moved in the optical axis direction together with the third frame and capable of rotating relatively to the third frame; a fifth frame moved in the optical axis direction by the rotation of the fourth frame; a sixth frame moved in the optical axis direction by the rotation of the fourth frame; first straight movement means disposed to the first frame and to the fifth frame to prevent the fifth frame from rotating; second straight movement means to prevent the third frame from rotating; first drive means disposed to the fourth frame and to the fifth frame to drive the fifth frame with respect to the fourth frame in the optical axis direction; second drive means disposed to the fourth frame and to the sixth frame to drive the sixth frame in the optical axis direction in an amount different from an amount of the fifth frame; third straight movement means disposed to the fifth frame and to the sixth frame to prevent the sixth frame from rotating; and third drive means for rotating the fourth frame while being rotated about an optical axis and for driving the fifth frame and the sixth frame in the optical axis direction by driving the first drive means and the second drive means.