The P-145 Flat Lens Port from AquaTech fits and protects the Canon 24-70mm f/2.8 II or 24-70mm f/4 IS lens when attached to a camera in an Elite or Delphin Underwater Sport Housing. It features a screw-on mount. 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 #10903 CZ 24-70mm f/2.8 V2 zoom gear for the f/2.8 lens, available separately, enables access to the full zoom range.