Jetwrench:
I have a trip to Bonaire in February coming up and am looking for some simple tips on setting selections for my P10. I have not used it underwater yet and am not sure where to start.
The best place to start is to familiarise yourself with the camera above water first, then get yourself underwater early on in the trip on a fairly easy, shallow dive preferably with little to no current, and then click away.
The great thing about digital, is you can see the results immediately! Try not to use the zoom, and instead get closer to the subject, taking care not to cause too much silt to fly around. If the water is clear, you should be able to use the internal flash with little or no backscatter. Your alternative is a darker shot, which will turn out blue/green, but Photoshop can usually pick out some colour.
Unfortunately with the Sony's you don't get much control over what the camera is doing, but you can play with the ISO and EV settings. The only way you can really affect exposure is to the different pseudo-program mode settings.
Make sure you turn the LCD on before you put the camera in the case, because the housing doesn't allow you to press the display button! Also take great care before every ive to make sure the O-ring is seated properly.
I also suggest that you memorise the positions of the 'mode' dial, as the housing dial only has one reference point, and it can be difficult to turn it to the correct setting.
Finally, make sure you have fun with it, and don't get dis-heartened if none of your photos turn out!