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#11078-HSS Optoelectronic TTL-Converter for SONY A7C camera for NAUTICAM NA-A7C underwater housing. Compatible TTL underwater strobes: Retra Pro (including Retra HSS support) Inon Z-330 / Z-240 / S-2000, Sea&Sea YS-D1 / YS-D2 (made-in-China)/ YS-250, Ikelite DS161 /, DS160, Subtronic Pro-270 / Pro-160.