The 30mm extension ring allows you to increase the effective length by 30 mm in a B120 porthole configuration.
The extension rings between the housing and the porthole are essential elements to ensure an optimal setup of your camera lenses. These rings allow you to adapt the distance between the lens and the porthole, ensuring optimal performance and sharp images.
Specifications
Depth rating: 100m / 330ft
Construction: Anodized anticorodal aluminium