Zeamonkey 0 Posted July 22, 2004 My housing do not have the option to whitebalance under water, so I want to WB before starting the dive instead of using autoWB during the dive. How can I tweak the WB for the best performance? Can this be done by WB of a whitecard with a tint of another color? The technique works on land but i'm not sure about underwater, since the light changes alot with depth. Anyone with an idea? Share this post Link to post Share on other sites
james 0 Posted July 22, 2004 Hi, Underwater, white balance will change as a function of depth. This is because the sunlight attenuates as a function of depth. So if you preset on the surface it will only be good for a certain depth and will look strange if you go up or down. James Share this post Link to post Share on other sites
echeng 0 Posted July 22, 2004 WB also changes as a result of subject distance. So if you WB on a card right in front of your camera, it isn't necessarily going to "correct" the resulting image as much as you might like it to unless your subject is as the same distance and depth. Share this post Link to post Share on other sites
Zeamonkey 0 Posted July 23, 2004 Thanx for the input! I guess i'll have to do it in post like i'm doing now.... Share this post Link to post Share on other sites
echeng 0 Posted July 23, 2004 You may want shoot a bunch of photos of neutral things while underwater -- white tanks, ike strobes, white sand, etc. Then, you'll have some photos to white balance with during post. Share this post Link to post Share on other sites
richorn 0 Posted July 23, 2004 I can't find your camera info, but if you can shoot RAW, this is a non issue, as white balance is best set in the raw convertor during import anyway. (IMHO) Share this post Link to post Share on other sites
echeng 0 Posted July 23, 2004 Well, it *can* be an issue if your raw converter cannot set the white balance to a suitable value. For example, most white values that I use when shoot without a strobe cannot be reached through Capture One's WB interface. You have to click on a neutral color in the image itself. If you aren't shooting something neutral in your frame, you won't be able to correct properly unless you have another frame with something neutral in it (taken in the same conditions). Share this post Link to post Share on other sites
james 0 Posted July 23, 2004 And since this is the Digital Video forum...hehe. Cheers James Share this post Link to post Share on other sites
echeng 0 Posted July 23, 2004 Oh! Oops. hehehehe. My bad. Everything in that last post concerns digital still shooters, shooting in RAW mode only. Share this post Link to post Share on other sites
richorn 0 Posted July 23, 2004 Oh man what a MAroon! Sorry guys, I am a little new around here and just saw the heading myself before I came to recheck the thread. And for a second I was hoping that I got away with it and could delete the nonsence I posted! Share this post Link to post Share on other sites
