Sea & Sea DX Macro Port Set for the Canon EF 100 USM
This set includes everything you need to house your Canon EF 100 USM lens in a Sea & Sea housing. Included are the Sea & Sea DX Macro Port Base, the Sea & Sea DX Macro Port 50, and the Sea & Sea Canon EF 100 USM Focus Gear. This setup allows the zoom knob on the housing to function for manual focus.