This Ikelite Port Extension can be added to most Port Body and Dome or Flat Assembly combination to extend the overall length of the port by 1.75". The extension allows manual focus control on the lens.
To check required port body and extensions Click here for port chart
Note! The Focus Extension should NOT be used with the bayonet-style #5510.10 Super-Wide Angle Port Body
Port Extension 1.75" with Manual Focus Control