Aquatech 50mm Extension Ring

Price on Application

The Aquatech 50mm Extension Ring has been replaced with the Aquatech P-50ex.

Out of stock

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The Aquatech 50mm Extension Ring is designed for use with dome ports. It extends the length of the port by 50mm.

This extension ring features a ball drive and ring gear zoom control allowing the full focal range of the lens to be utilized.

Aluminum construction with knurl grip for easy installation.

Use this extension ring with these ports for the following lenses:

  • Canon 16-35mm f/2.8 ER-50 with LP-3 Lens Port
  • Canon 16-35mm f/2.8 II ER-50 with LP-3 Lens Port
  • Canon 17-40mm f/4 ER-50 with LP-3 Lens Port
  • Sigma 8-16mm f/4.5-5.6 ER-50 with LP-1N Lens Port
  • Tokina 11-16mm f/2.8 ER-50 with LP-1 Lens Port or ER-50 with LP-3 Lens Port

LP series ports will work on the following Aquatech housings:

  • DC5-V2
  • DC5-V3
  • CO-7
  • CR-60
  • CR-7
  • CC-14
  • NB-300s
  • NB-700
  • NB-800
  • NY-3s
  • Ny-4


  • The extension features a direct drive zoom control
  • Medium diamond knurl grip for ease of installation
  • Piston seal o-ring on major thread base
  • Weight: 453gm
  • Dimensions: 127 x 140 x 127mm