N85 to N120 55mm Port Adapter ~with Lens Control Knob focus Depth Rating 100m Port System

Depth Rating 100m Port System N120 Weight 1

Then you will be able to install the focus gear by sliding the metal portion over the top of the lens and pressing it down until it sits flush with the plastic insert

-Integrated universal tripod mount

but add a Nauticam M16 Vacuum Valve

N85 to N120 55mm Port Adapter ~with Lens Control Knob focus Depth Rating 100m Port SystemAn adapter to convert from an N85 port opening to N120 port opening to allow for the use of N120 ports on N85 Port System housings. The extension also has an integrated zoom gear knob. See Port Chart for more details on choosing the correct extension and port. Technical Specifications Depth Rating 100m Port System N85 to N120 Conversion Weight Port Opening Diameter Port Diameter Body Material Anodized Aluminum Alloy Port Material Port Coating Port