Nauticam 230mm Optical Glass Dome Port II

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Nauticam 230mm Optical Glass Dome Port II

Part #: Nau-18812

Nauticam 230mm Glass Dome Overview:

The Nauticam 230mm Optical Glass Dome Port II is a top of the line dome with the highest optical standard. The 230mm glass dome port is perfect for full frame cameras and has been manufactured using the highest quality materials to ensure exceptional optical performance. The large glass dome reduces water bleading, drastically helps with cornder sharpness on rectalinear lenses, and the large surface radius makes for fantastic over/under shots. It works with Nauticam dSLR housings, and will work with mirrorless housings like A7r III housings with a N100 to N120 adapter.

This port works with your rectinlinear 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, the Nikon 17-35mm f/2.8, and many others.

  • 9 inch glass dome port
  • Perfect for wide angle rectilinear lenses
  • Drastically improves corner sharpness
  • Easily facilitates over/under shots (split shots)
  • Includes dome port cover and removable port shade

Techincal Specifications

  • Depth Rating: 100m
  • Port System: N120
  • Weight: 2.67 kg
  • Port Opening Diameter: 109mm
  • Port Diameter: 230mm
  • Body Material: Anodized Aluminum Allow
  • Port Material: Optical Glass
  • Port Coating: Multi-layer Broad-band Anti-reflective Coating Inside
  • Port Shade Material: ABS
  • Spare O-ring: NAU-90140

*Dome port updated for Canon 11-24mm lens

  • This dome now supports the Canon 11-24mm lens.
  • The internal port opening of this port was enlarged from the Nauticam 230mm Optical Glass Dome Port I to compensate for larger diameter lenses like the above Canon EF 11-24mm f/4 USM.


Please refer to Nauticam Port Chart for a list of compatible lenses

Please call the Bluewater Photo team at 310-633-5052 with any questions, or email us at

Weight: 4.80 LBS
Dimensions: 10.00 (in) × 6.00 (in) × 10.00 (in)
Free Worldwide Shipping: No
Brand: Nauticam
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