Since it seems to be digital photography week...
Does anyone have any tips, or is there an idiots guide anywhere to tweaking underwater pics in photoshop (or similar)to correct colour balance (specifically the very blue casts I got a year or two back in the red sea when using a digital camera at anything more than 10 or so meters down without an external strobe).
I've never really spent much time in photoshop, but when I have tried randomly moving red and blue and green sliders about, it doesn't really seem to achieve what I am looking for.
I did try a plug in filter (Digital ROC from memory?) which seemed to do the right sort of thing, but I suspect that with a little bit more knowledge, it would b possible to produce better results manually.
David