| 摘要 |
PURPOSE:To obtain a driving mechanism which can be used in common in both photographing systems of normal image/mirror image by providing a reflecting mirror which folds the optical axis of an image in a first unit to be attachable/detachable and mounting a second unit to the first unit corresponding to folded optical axis of the image at the time of mounting the reflecting mirror. CONSTITUTION:At the time of photographing a normal image, the second unit 8 is separated from the first unit 5 and a shading cover 64 is detached from the second aperture 63 of the second unit 8, then a mirror block 28 is detached from the cover 64. And the first aperture 62 of the second unit is closed with the shading cover and the mirror block 28 is mounted on the depression part 26 of a lens block 4 of the first unit 5. The roller 71 of the second unit 8 is fit in the rail grooves 69a-69c of the first unit 5 in a vertical position and the second aperture 63 of the second unit 8 is inserted in the lens block 4 of the first unit 5 so as to unite the second unit 8 with the first unit 5, then after fixing with a screw-knob 70 a device is switched to the photographing of the normal image.
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