I have used my DSC-V3 camera with an underwater Ikelite housing for the 1st time last week and got some feedback: When doing underwater photos, nobody ever use automatic mode. All the photos are done in Manual mode to get the best combination of speed, aperture, ditance, flash power setting. Automatic mode are very good on surface but is not able to compute in a blue or darker environment. Brain needs to take care.
To be helpful (and certainly the others scuba divers using this camera), it would be better to get a diving mode with these specifications: 1) to show the focus distance computed by the camera. It helps choose the flash power and aperture 2) in the Ikelite housing it is nearly impossible to use the knob on top of the jog dial to set speed and aperture values. The underwater pressure is always pushing the jog dial, so it always "randomized" the values set. I had the greatest difficulties to do so (few minutes). That's the disadvantage to have 1 dial to set 2 values. What could help is to sacrifice another button like Night... to replace the pushing on the jog dial and still using the job dial to set values & not taking into account any push on it.
I am willing to take the risk to change the firmware by myself (if I am able at least to reload the original firmaware).
Do you know how I could get my hands on the firmware and development environment?