| 摘要 |
A device for the protection of camera lens and the fixation of cameras, the device is a screw up bolt, its special feature lies in the screw-up-bolt being a round stub, the inner dimension of the bolt is to connect with the outer bottom of the camera with a matching thread or bolt flute. It could screw up with the bolt stub with inner screw thread, and to match up in accordance with the sizes of camera lens in varied screw threads of different designs by various manufacturers. The device could screw up with the bolt at both ends to connect with camera lens, therefore, it could connect two camera lens at the same time.
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