Actually I have more then one bag. All my underwater equipment weights about 450 kg.
My favourite cameras are Nikon cameras. When we started Orda Project, I had only Nikon D200 and Fuji S5Pro. Now I have Nikon D3s и Nikon D3x but I am thinking about changing to Nikon D4S.
20/2.8d, 24/1.4, 35/1.4, 58/1.4 60/2.8 macro, 105/2.0DC, 80-200/2.8d
To tell you the truth, I prefer wide angle lenses: I like to have the entire world in the photograph, not a small part of it.
“Dry land” strobes – Nikon SB900 – 3 pcs, SB800 – 2 pcs, SB80, Nissin Di866 – 6 pcs, radio controls Flama – 8 pcs, feeding blocks Nissin – 5 pcs, and a lot of other stuff…
To have the possibility operate camera underwater I use Subal housing. This is waterproof box with flash connectors and controls which allow access to all functions, for convenient and comfortable handling of the camera functions.
And light! There is complete darkness in a cave; no sun beam comes through the rocks over your head, so you need a lot of light. I use underwater strobes, specially designed for UW-photographers – Ikelite DS160. Actually, I used up to 8 strobes simultaneously. Probably, you may think, it is not big quantity, – just imagine that you cannot place them on tripods (because of silt on the floor). So you have to operate them holding them in your hands.