Puffer. Regarding WB, my ZS3 has automatic, manual and several preset settings such as UW. For video without a video light, do you recommend just using the Underwater mode or do you recommend using Manual WB? If Manual WB, what is the best way to set it if using the grey card doesn't work that well?
compare this video (sorry, I keep changing formats).. this one is quicktime.. to the one above... same water.
This was done with auto white balance, and is about 20 feet shallower:
http://www.scubaboard.com/gallery/data/500/MVI_0948.MOV
Same water, just the first one would have even less red.
The only difference is manual white balance.
These happen to be canon ones, but the same rules apply for any camera..
So, in general, here they are:
1. Shallow, clear water... you can use the UW setting..or set manual, but both can do a very nice job.
2. Water that is not clear, you can use the grey or white card...you are adjusting for the amount and color of light that is getting down that far.
3. Bad vis, very off color water...here there is as much an issue with light getting to you, as there is the light travelling from the subject to you. I you adjust with the grey card, things will have good color close to you, but things farther away will not.
Off the panhandle, tried white, grey... small, then bigger, then really big, never got the right color of water.. Then I tried using the bottom, pointing it at various directions and distances (heck, it is only a button push, until you get the right look, and then doing the video...water now looks like some tropical, clear water place.
I have a lot of really green, washed out video's I did, until I learned to just be willing to reset manual until I got good color.
This was filmed about 50 yards away from where the nurse shark was done.. only with manual white balance. You will notice that at the very start, there sunlight over exposing the red channel..this is in around 70 of very green water, and that channel is turned up about as high as it will go.. so any red that gets down there were over load the sensor.. a light, by the way, shows a dark red beam...so I have to avoid lights.
http://www.scubaboard.com/gallery/data/500/MVI_1969.mpg