I have a
Nauticam Extension Ring 40 with Lock $300 selling for $150
http://www.nauticam.com/images/product/p_88.pdf
Nauticam Sea & Sea Port Adapter $20
Adapter allow me to use Nauticam Dome on Sea&Sea housing
Nauticam Extension Ring 40 with Lock $300 selling for $150
http://www.nauticam.com/images/product/p_88.pdf
Nauticam Sea & Sea Port Adapter $20
Adapter allow me to use Nauticam Dome on Sea&Sea housing