230mm Optical Glass Fisheye Port

Nauticam's optical glass dome ports are finely ground to the highest precision and represent the state of the art in manufacturing and optical technology. This fisheye and wide angle optical glass dome port is 230mm in diameter and is part of the N120 port system. The internal port opening of this port is enlarged for larger diameter lenses such as Canon EF 11-24mm f/4 USM. Port extensions or adapters may be required for some ports and housings.

Spherical Dome Port of 9" in black anodized aluminum and optical crystal. To be used directly mounted on the housing or with extension rings with 120mm bayonet.

DP-230 230mm Fisheye Dome Port In keeping with the Zen Underwater tradition of excellence, we are proud to offer our flagship dome port. The DP-230 port is the long awaited solution for photographers using rectilinear wide angle lenses like the Canon 16-35mm f/2.8 L II, Canon 16-35mm f/4  L, Canon 17-40mm f/4 L, and the Nikon 16-35 f/4 VR.  For exceptional image quality from a full frame camera, the DP-230 is the port you’ve been waiting for.  The newly designed DP-230-N120-1124D for Nauticam is now compatible with the Canon 11-24mm f/4 and is depth rated to 100m.  Please contact us if you are unsure which model you have. BK7 Optical Glass Dome The DP-230 is constructed from hand crafted materials with an optically coated BK7 glass dome at its core. The surface 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.  This coating yields an amazing 99.7%+ transmissive value for true distortion free images. Large Radius Assures a thin water line for over/under shooting, and the optically coated glass surface minimizes water beading. Aluminum Shades Designed to offer a lifetime of service and extend far enough to protect the dome when placed face down.