| 摘要 |
PROBLEM TO BE SOLVED: To provide a zoom lens barrel in which a focal distance is changed by manual operation and a focus lens or a focus lens holding member is prevented from interfering with its adjacent member when the focus lens is manually moved at high speed in the zoom lens barrel with mechanical simple constitution. SOLUTION: In this zoom lens barrel, focal distance changing operation is manually performed and the focus driving amount of a focus lens group 14 is made different according to the changed focal distance, and also other component members are positioned within the movable range of a lens frame 24 holding the focus lens group. The zoom lens barrel is equipped with a focus lens group zoom moving frame 19 zoom-driving the focus lens group 14 while holding the lens frame 24 and a spring 28 energizing both of them in a direction where they are separated from each other in an optical axis direction with the lens frame 24.
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