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: