Enjoy smooth, seamless lens operation underwater when using AquaTech's 10953 NZ 70-200mm Zoom Gear for the Nikon 70-200mm f/2.8 VR II Lens. Mount the gear on the zoom ring of your lens, then connect it to the zoom control knob of your AquaTech Delphin or Elite Sport Housing. When you're ready to shoot, you'll be able to zoom the lens back and forth from outside the housing.