Short answer: ignore the numbers, which has little to do with ‘accuracy’. CCT WB value is rather meaningless anyway. CCT Kelvin defines a large number of possible colors for one. Each raw processor will report differing values from the same raw image as well. I've measured a light source with a Spectrophotometer below, and you can see what it actually measures and what two raw converters report (one being Adobe's) is different. The numbers reported don't really matter; the color appearance in a raw converter and how you want it to appear is essential. http://digitaldog.net/files/CCTandRaw.jpg http://digitaldog.net/files/RawWB_Differences.jpg Andrew Rodney http://www.digitaldog.net/
On Nov 17, 2023, at 12:34 PM, Louis Dina via colorsync-users <colorsync-users@lists.apple.com> wrote:
Okay you gurus, I have some questions about white balance, and I’ll use an example to hopefully make it clearer.
I often take nature photos in the woods, and it’s not unusual for my DSLR’s AWB to set the WB to something like 4200K and a tint of -3 or so. The camera sees all the greenish yellow leaves on the trees, reddish yellow leaves on the ground and probably assumes there is a yellowish cast, so it assigns a cooler WB to neutralize the “color cast” it thinks it sees. The result is an overly bluish image, and depending on the amount of green leaves or yellow-red leaves, it adjusts the tint as well. Not very accurate.