Nauticam 70mm extension ring for Canon 11-24mm

Nauticam 70mm extension ring for Canon 11-24mm

Nauticam Camera Housings

  • $780.00

Nauticam 70mm extension ring for Canon 11-24mm Lens


  • Effective length: 70mm
  • When using with the Canon EF 16-35mm f/2.8L II USM lens, swapping the internal cog may be required.
  • The Nauticam Extension Ring 70 with Focus Knob is part of the N120 Port System and can be used to add 70mm effective length to an N120 Port setup.

    This Port Extension ring features a focus knob that can be used to operate supported optional focus or zoom gears.

    This Port Extension 70 is designed to support the Canon EF 11-24mm f/4L USM lens.  An additional focus gear is required.

    See Port Chart for more details on choosing the correct extension, port and focus/zoom gear.


    Depth Rating 150m
    Port System N120
    Port Opening Diameter 109mm
    Port Diameter
    Body Material Anodized Aluminum Alloy
    Port Material
    Port Coating
    Port Shade Material
    Removable Port Shade
    Spare O-ring 90140


Use with the Nauticam optical-glass fisheye DOME port. It has a diameter of 230mm Part of the N120 port system. The internal opening of this port is enlarged for larger diameter lenses like Canon EF 11-24mm f/4 USM.

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