Nauticam N50 3.5" acrylic dome portThis 3. 5" wide angle dome port is part of the N50 port system and features an acrylic element, anodized aluminum construction and an integrated aluminum port shade. Designed for fixed lens compact cameras, this dome port restores the in air field of view of the camera's lens. Different size ports are available to support a wide variety of lenses and housing types. Port extensions or adapters may be necessary for some ports and housings. Technical