A stereoscopic beam splitter having cameras with submersible lenses, such that the entire apparatus is filled with water when submerged. Submersible lenses designed to capture high-quality images underwater are utilized, allowing an underwater three-dimensional stereoscopic camera apparatuses to forgo a sealed housing with window port traditionally found in underwater stereoscopic beam splitter systems. The lack of a sealed housing and window port allows for drastically improved underwater image capturing performance and greater pressure caused by deeper water, in addition to making said apparatuses lighter and more compact.