Need some help with night photography

[KidK9]

Hey all, I'm going to Kona in two weeks and I'm doing a night/Manta dive. Can anyone give me advice on how to set my camera up for this? I've never shot night photos before and I want some killer shots of the Mantas.

C-5050Z
Inon D180 strobe
ULCS arm and tray

 

[devilgas]

at a rough guess, i'd say:
wide angle (35mm with the 5050?), mid aperture and manual focus set at about 2m. flash aimed for similar distance. depending on the aperture, you should get sufficient DoF to capture anything you see. if you can, try the settings to see which gives the best results on a pre manta night dive.