I understand your explanation that actually is the same as in many sites and we can see examples of TM700 shots on vimeo but keep in mind that all these shots are above the water.
What I understand form many discussions on italian uw video forums, it's like the color balance settings of the camere are somehow screwed up while underwater.
Would be nice to see some uw shot without correction.
If this is so widely discussed, I'd be interested to see a link and/or photographic example.
I'm more inclined to think that it's not the camera that's responsible for what you are describing...
The laws of physics are the same underwater or on land...color temperature is color temperature. The same with a camera's color gamut...if it's OK on land, it'll be OK underwater.
However, dealing with the spectral properties of the water (ie its color cast) is a totally different thing (to WB) and can vary greatly... temporally and spatially.
Correcting for this is something different to acquiring the correct ambient Kelvin setting. It's not something that the camera can do on it's own. It requires appropriate in-situ filtration and/ or color grading in post (note...color grading, not correcting white balance)...or fill lighting.
Sorry if I sound sceptical...30 years as a career research scientist has made me wary of unsubstantiated generalizations...
Edited by HDVdiver, 12 May 2010 - 02:50 AM.