| 摘要 |
PROBLEM TO BE SOLVED: To make a cam pin detachable without reducing intensity of a cam tube.SOLUTION: The lens barrel includes: a first holding member that protrudes in a radial direction of a first optical member, has a detachable first cam pin, and moves in a direction parallel with an optical axis of the first optical member while holding the first optical member; a first cam groove that engages with the first cam pin, and drives the first holding member in the optical axis direction of the first optical member during photographing; and a drive tube that has an extension groove arranged to extend from one edge of the first cam groove. The lens barrel includes a first maintenance hole that is formed in the extension groove, and causes the first cam pin to pass in the radial direction when the first cum pin is attached and detached to and from the first holding member. |
