| 摘要 |
A zoom lens barrel is provided to decrease a volume of the zoom lens barrel by enabling a user to manually adjust a zooming ratio without using a motor and a gear. A zoom lens barrel includes at least two zoom lens groups(111,121), which are arranged on a first optical axis. A distance between the zoom lens groups is adjusted on the first optical axis, such that a zooming ratio of an optical system is changed. The zoom lens barrel includes a manual driving member(130A) and a power delivery member(131). The manual driving member generates operational power from a manual manipulation. The power delivery member is connected to the manual driving member and slid in parallel to the first optical axis. One of the zoom lens groups is connected to the power delivery member. When the manual driving member is manipulated, the zoom lens group, which is coupled with the power delivery member, is moved toward the first optical axis.
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