The AquaTech PD-75 Dome Lens Port fits the Canon 8-15mm f/4L lens as well as the Tokina 10-17mm f/3.5-4.5 lens with hood. It screws onto Elite and Delphin Underwater Sport Housings. The port features a depth rating of 33'. Its body and front element are constructed from acrylic and its base is made from aluminum. The port is mechanically sealed and uses no adhesives.