| 摘要 |
PROBLEM TO BE SOLVED: To provide a lens barrel capable of reducing harmful reflection light on the optical path side surface of the arm part extending in the optical axis direction of a rotation control member without modifying the structure of a conventional lens barrel. SOLUTION: Notched parts B-1a and B-2a are formed in areas facing the effective optical path surface of the arm-like control parts B-1 and B-2 of the rotation control member B for controlling the rotation of a straight-advance barrel E which moves straight with reference to a cam barrel D extending with rotation around an optical axis.
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