deztoys wrote:
I was out playing with the 10D at the local pier (Newport Beach) and was trying to correct the color balance for the sodium lights (I think they are soium, bright yellow/brown). Bot none of the presets seemed to make a difference. Has anyone solved this challenge? Does one of the presets normally sove this or do I need to use the manual temp setting to make a difference.
Thanks.
Sodium light is monochromic yellow light (wavelength = 589nm). As such, there is no "color balance" possible. The only thing you could do is to shift the visible yellow to white. Theoretically you would then get a B&W picture, without any colors visible. Objects which absorb yellow light appear dark, and objects reflecting yellow light appear light. Don't expect any blue, green or red color. In the case of a pure sodium lamp you could easier convert to B&W without losing any color information.
In real life, you don't find exclusive sodium light. It's normally mixed with some tungston and/or mercury light. If you now adjust sodium yellow to white, these other light sources will appear extremely blueish.
I'd recommend to shoot RAW and play with color until it looks good. As I said, there is no true compensation possible. That's a matter of physics and it's not camera-dependent!
--Jens--