ys-d2j

I have 2 S&S YS-D2J models that I purchased last year in a good covid sale, but have yet to take into the water. If anyone is interested in taking them at my purchase price, I'll upgrade to the YS-D3. However, I fly to the Bahamas at the end of next week, at which point they'll stop being...

Is there a way to use TTL with built in camera flash + fiber cables or do you have to use manual on the strobe itself? Does the built in flash adjust in strength depending on light (i.e. if I set my S&S YS-D2js to TTL will they work the way I want them to or not?)?

I looked through the manual for my YS-D2Js, but it seems lots of UW photography equipment manuals assume you already more or less know what you're doing. As a newbie to all of this, I have a couple questions I'm hoping someone can help educate me on. 1) When shooting in manual mode, I notice...

How to tell a YS-D2J from “non-J”?