Ikelite 0.75" (1.9cm) Port Extension
Port Extensions can be added to any Port Body and Modular Dome or Modular Flat Assembly combination to extend the overall length of the port.
Extension length is added to overall lens length accommodated by a given port combination. Lens length is measured as the maximum extended length from attachment point on the camera body. Maximum lens diameter is limited to 8.4cm (3.3").