When the YS-03 is used with a non-Sea & Sea housing, an optional Strobe Mask Set may be required along with the fiber-optic cable, in order to block most of the camera's built-in flash. This way, only the part needed to trigger the strobe will be uncovered, preventing the flash from causing backscatter, glare, hard shadows, or uneven lighting.
Stick the Velcro tape to the underwater housing covering the camera’s built-in flash. Connect the Fiber-Optic Cable.
