| 摘要 |
PROBLEM TO BE SOLVED: To achieve miniaturization, reduction in thickness, reduction in weight, reduction in cost, and so on by miniaturizing an outer contour of an ND filter blade.SOLUTION: A camera blade driving device includes a plate 10 with an aperture 10a, a back plate 20 disposed in parallel with the plate 10, an ND filter blade 40 freely movably stored between the plate and the back plate, and a driving source 70 which drives the ND filter blade so as to allow it to freely swing. At least a portion from an effective area covering the aperture to an area on the free end side, of the ND filter blade 40 comprises only a tabular ND filter 41, and a rail plate 60 is provided which is disposed adjacently to the ND filter blade so that a part on the free end side of the ND filter blade is freely movably slid on the rail plate 60. This configuration prevents scratches or the like to allow a desired light quantity control function to be obtained while achieving miniaturization and so on of the ND filter blade. |
