Looking at the PBS teaser I see an interesting configuration. The guy has two Sola 4000 each in front of the other straight in front of the camera. He "simply" put the critter between the lights. Maybe with this conf he can even prefocus.
On the PBS video the guy has some light orthogonal to the lens lighting a self made piping...
So here are my questions.
Which lens and gear are best suited for blackwater filming?
Last but not the least... Has anyone ever organized a blackwater dive?
I find only tips on photograph critters. I have a boat and I would like to organize one.