As a new diver I am not ready to take my camera in open water yet but should have no trouble kneeling on the bottom of a pool next week to help shoot underwater Santa pictures. I'll definitely try some shots while attempting to stay horizontal a few feet off the bottom.
If I can figure out the housing controls, trying different settings and strobe positions shouldn't be a problem but I would like some settings to start with.
For a D3S in an Aquatica housing my thought was to use a 14 -24 with a 9 ¼" glass dome. Corner sharpness is not a concern and in fact soft corners could be a benefit. I also have a macro port, 60 and 105 macro lenses, a 15mm FE sigma and a 24 – 70.
I have two Ikelite DS-161 strobes connected with 2 x 2 ea. 8" ultralight strobe arms. We have the pool at night and lighting is poor so I don't think ambient light will work very well but I will test a few shots. Using high ISO with the D3S is not a concern. I need to study up on the strobe settings but I assume I can set the main light at around half power and the fill light a stop or two lower? I might learn water diffuses the light so fast that different power settings won't give me the subtle shading I look for when shooting portraits.
I would like to start about F8 if the pool wall isn't too ugly. I might even look around for a background I can drape over the side of the pool. With strobe 1/60 ss should be fine. I am equally comfortable with iTTL or manual. I was thinking about putting one strobe off to one side for the main light and position the fill light high over the opposite side of the camera.
Edited by GeorgeH, 22 November 2011 - 08:11 PM.