| 摘要 |
PROBLEM TO BE SOLVED: To reduce an influence caused by the rotation of a correction lens around an optical axis and to smoothly move the correction lens. SOLUTION: This device is provided with a second lens group L2 which is a part of a photographing optical system, a movable frame 32 movable by holding the second lens group L2, a unit main body 31 freely movably holding the movable frame 32 in a direction different from the direction of the optical axis, a driving means driving the movable frame 32 and a position detecting means detecting the relative position of the movable frame 32 and the unit main body 31. The position detecting means is constituted of projecting means 45a and 45b provided at the unit main body 31, photodetecting means 51a and 51b similarly provided at the unit main body 31 and slits 64a and 64b provided at the movable frame 32, and the slits 64a and 64b are formed into a circular- arc shape by centering the optical axis of the second lens group L2. |
