Few days in Sharm El Sheikh we tested new TTL Converter for underwater photo. Optical & Wire TTL-Converter is made by "Underwater Technics" group of companies. This is the 1-st product on the market, which supports  Optical TTL, Electric Wire TTL, and mixed TTL in one device.

Continues working time of battery - 5 years (or 75 000 flashes).

TTL Converter was specially developed for Nauticam underwater housings (Nikon D600/610, D7000, D7100, D7200, D750, D800/E, D810, D4/S). Device was tested with Inon Z-240 and Sea&Sea YS-D1 strobes.  We made about 100 shots everyday (wide-angle and macro) and got true lighting in 95% shots, without any +/- correction.