Nauticam Macro port 45 w/ focus zoomThis Nauticam Macro Port 45 is designed for housings supporting the N85 Port System. The front of the port has integrated 67mm threads for accessories and features a knob that can be used to control zoom focus via available focus zoom gears for supported lenses. This Macro Port is identical to the N85 Macro Port 45 (SKU36128) with the addition of the focus zoom knob. Technical Specifications Depth Rating 100m Port System N85 Weight Port Opening