| 摘要 |
PROBLEM TO BE SOLVED: To allow easy determination of a mechanical end of a feeding side without separately providing a dedicated lock component and to enhance the strength against impact or twisting force from the outside. ! SOLUTION: An optical device includes: a fixed cam ring 9; a movable cam ring 8 which is moved in an optical axis direction while rotating, in accordance with a cam groove formed on an inner peripheral part of the fixed cam ring 9; inside lens holding parts 1 to 3 which are moved in the optical axis direction in accordance with cam grooves formed on an inner peripheral part of the movable cam ring 8; an outer lens holding part 5 which is moved in the optical axis direction in accordance with a cam groove formed on an outer peripheral part of the movable cam ring 8; and an outer cylinder 81 which is provided on the outer peripheral side of the outer lens holding part 5 and between the outer lens holding part 5 and the fixed cam ring 9 and is fixed to the movable cam ring 8 and is moved |
