Sea&Sea FC Focus Gear for Canon EF 17-40mm f/4L USM Lens #bestsellers Quick Shoe W50 Clamp or

Quick Shoe W50 Clamp or Quick Shoe Main Base

green water and a special diffuser for sharks are available

The bottom of the SD Front Mask for HERO9 has a screw hole to attach joint adapters including "Direct Base III"

Look for filters that attach to your lens prior to installation

Sea&Sea FC Focus Gear for Canon EF 17-40mm f/4L USM Lens #bestsellers Quick Shoe W50 Clamp orThis focus gear enables manual focus adjustment for the Canon EF 17 40mm f 4L USM lens via the Extension Ring 46 with Focus Knob #30117 when used with Sea&Sea MDX series housings. The focus gear is useful in the following situations: * When you need to manually adjust focus as your subject is not situated within the AF frame or in order to maximize the effect of the lenss minimal shooting distance of 28cm 11 inches. * When you shoot fast moving