The AquaTech P-215 Flat Lens Port fits and protects a Canon or Nikon 70-200mm f/2.8 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' and its body and front element are constructed from acrylic. Additionally, the front element features a Scratch Abrasive Resistant (SAR) coating. The #10904 CZ 70-200mm f/2.8 IS2 and #10953 NZ 70-200mm f/2.8 V2 zoom gears for Canon and Nikon, respectively, are available separately. They will enable access to the full zoom range.