The TELESIN T05 semi-hemispherical 6' dome port is one of the most advanced accessories available for the GoPro.
Moving the waterline away from the lens makes it possible to capture images both above and below the water simultaneously. These are often referred to as half and half, 50/50, over under or split-level pictures.
The use of a semi-hemispherical dome eliminates the perpendicular angle between the backing plate and the dome. The benefits of this are the elimination of circular reflection and improved water sheeting while reducing the form factor and maintaining full front face surface area.
-The side of the base has 12 screws, this design allows the dome to be fully disassembled for cleaning and service.
The simplicity of operation, nearly infinite depth of field, wide-angle lens and video and still image quality make the GoPro perfectly suited for this application.
The GoPro is just as secure as always since the Dome Port slips right onto the housing, it does not alter the depth rating of the GoPro housing.