The P-160 Flat Lens Port from AquaTech fits and protects the Canon 24-70mm f/2.8, Nikon 24-70mm f/2.8 or Canon 24-105mm f/4 lens. It screws onto Elite and Delphin Underwater Sport Housings for cameras. The port has a depth rating of 33'. Its body and front element are constructed from acrylic, and its base is made of aluminum. Additionally, the front element features a Scratch Abrasive Resistant (SAR) coating. The port is mechanically sealed using no adhesives. The #10902 CZ 24-70mm f/2.8 V1 and #10952 NZ 24-70mm f/2.8 zoom gears, available separately, are for the Canon and Nikon 24-70mm lenses, respectively. These gears enable access to the full zoom range.