| 摘要 |
PROBLEM TO BE SOLVED: To provide a surface wave motor incorporating lens barrel whose operability of manual focusing is good regardless of the rotation angle of the moving body of a surface wave motor and the specification of the lens barrel. SOLUTION: This lens barrel is provided with photographing optical systems L1 to L4, a fixed lens barrel 1, the surface wave motors 6 and 9, a motor driving control part, a manual operating part 10, and mode selecting parts 20 to 22. Rotation angle converting devices 25 and 26 capable of transmitting the rotation angle of the part 10 to that of the fixing body of the motor 6 at an optical ratio are provided. |
