« on: June 08, 2013, 02:35:09 PM »
Anything in the hotshoe? On a Canon body, setting Flash WB isn't a constant 6000K no tint like it would be if you set it in a RAW converter (other than DPP). On-camera setting for Flash WB uses color information passed from a Canon flash, so the WB isn't a constant color temp - the idea is to compensate for color temp changes in the flash tube output. Perhaps with a CyberSync or other 3rd party trigger in the hotshoe, an odd signal comes back occasionally? You could try setting a Kelvin WB.I have a pocket wizard mini TT1 in the hot shoe triggering Einstein flashes. No Canon flashes.
I am never happy with the WB at any setting. Auto is usually too cold and since the LCD on th camera is completely inaccurate, trying to get a Kelvin WB using the camera would be impossible. I can try a custom WB but since color temperature shifts according to the power of the flash and ambient light is always different, I rather stick with a preset value and then fix it in Aperture.
I like a warmer WB anyway. Sometimes accurate WB makes skin tones look too pale or greenish, so I like to tweak ot to my taste.