This is lit by hand in 0.5s (within a 2-seconds exposure). I just uploaded the behind-the-scenes on ig. Check this out if you're curious about this technique :)
www.instagram.com/p/CmuGpoQvCrn/
A few things about this one:
1- It's really hard to get sharp images when working with the waves like this. My trick is to do extremely fast movements with my tube (MilkyWhite). I went as fast as 1/2 second within a 2-seconds exposure during that night
2- Another challenge we had that night was that we couldn't get a proper alignement with the sun (dirty beach on the right side). I thought about using a 50mm lens which totally saved the night. The narrow field of view was exactly what I needed to be able to get that super cool composition
3- exifs: 50mm, f5.6, 2sec, iso100, 2000 lumens