Zen Underwater 230mm (9in) Glass Fisheye Dome Port for Subal /4

Full frame shooters rejoice! In keeping with the Zen Underwater tradition of excellence, we are proud to offer our flagship dome port. With the DP-230 port you will finally have a port that will do justice to your expensive rectilinear wide angle lenses like the Canon 16-35mm f/2.8 L, Canon 16-35mm f/2.8 L2, Canon 17-40mm f/4 L, Nikon 16-35 f/4 VR, and the Nikon 17-35mm f/2.8.

Like all Zen Underwater ports, the DP-230 is hand crafted from the finest materials and represents the state-of-the-art design and optical technology. Like out highly acclaimed DP-200, it begins with a BK7 glass dome. This yields outstanding optical performance, easily equivalent to or surpassing any other dome currently available at any price. The large radius assures a thin water line for over/under shooting, and the glass surface minimizes water beading.

The interior of the dome element is coated with a magnesium fluoride broadband anti-reflective coating to minimize internal reflections from camera lenses, lettering on cameras, etc. which can be a problem in a bright ambient light situation.

The exterior is treated with a proprietary scratch resistant coating to control lens flare. This coating yields an amazing 99.7% transmissive value for true distortion free images.

For exceptional image quality from a full frame camera, the DP-230 is the port you have been waiting for.

Weight: 4.8 pound / 2.2 kg
Overall diameter: 250mm / 10 inch
Overall height: 110mm / 4.3 inch