Patent ID: 8204368

Claim:
A port for underwater photography attachable in use to a housing, the port having a control means operable externally of the port to engage and disengage a ring forming part of a lens positioned, in use, within the port, wherein the control means includes pads, the pads in use engage the lens ring, a first operation of the control means causing the pads to one of engage and disengage the lens ring and a second operation of the control means causing the pads to rotate the lens ring, wherein the control means further includes an apertured ring, biased arms mounted on an exterior of the ring, the arms having the pads thereon, the pads being extendable through the apertures to engage the lens ring, and a further ring about the arms, the further ring having means thereon to bear on the arms to push the pads through the apertures against the bias, the further ring being caused to rotate about the ring's longitudinal axis by the first operation of the control means.