Quote Originally Posted by neuroanatomist


...But if you aren't using DPP for post-processing, you might be losing some data if you shoot with a Canon flash. The flash passes color temparature information to the camera, which I think is stored separately in the RAW file from the WB, but used by DPP when selecting Auto or Flash WB. On a shot where flash was used, when I set Flash WB in DxO, it's a fixed 6000 K, but Flash WB in DPP is not a fixed color temperature, it varies by shot based on the supplemental data in the RAW file, which other programs ignore (along with things like AF point, etc.).
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For the sake of (obvious) clarity, this applies if you're using a single flash on-camera. If you're using any remote flashes of any kind, you lose the avenue for this reporting AND should probably be correcting all of your flashes to a common point.