| 摘要 |
A lens barrel including a plurality of lens groups; a plurality of lens retaining frames; a telescopic cylinder retained by a fixed base member and configured to retain a portion of the plurality of lens retaining frames inside of the telescopic cylinder; and a lens retaining frames driving device configured to drive the plurality of lens retaining frames. A portion of the lens retaining frames driving device for driving the lens-retracting frame which is one of the lens retaining frames is formed to project backwardly in a direction of an optical axis from a rear end surface of the fixed base member for retaining the telescopic cylinder.
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