UW Technics External M16 Optical TTL-Converter for NIKON cameras for ISOTTA underwater housings

External M16 Optical TTL-Converter for NIKON cameras for ISOTTA underwater housings. Installation in M16 threaded hole on the top of the housing. Please check compatibility with a specific housing and the need for an extension. Compatible underwater strobes: Inon Z-240/ Z-330/ S-220/ D-200, Sea&Sea YS-D1 / YS-D3 Mark II / YS-D3 DUO, Retra Pro MAX (including HSS), Marelux APOLLO III V2.0 (including HSS), Marelux APOLLO-S (including HSS).