| 摘要 |
The device includes a lens port (1) for underwater photography attachable in use to housing. The port (1) has a control element which includes a knob (2) operable externally of the port (1) to engage and disengage a ring forming part of a camera lens positioned, in use, within the port (1). The construction will operate even if there is some misalignment between the port (1) and the lens during insertion of the lens into the port (1).
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