The first two feature don't really need your attention. To capture "Dust Delete Data" you follow the instructions in the manual. Once you captured these data they are appended to every single image (Canon claims that the data size is very small). Later an external RAW converter can make use of these data to help removing dust spots. Because the structure of these data is not disclosed by Canon only Canon's new DPP 2.2 can use them right now. We could envision that other RAW converters may follow in the future..



Link: Outbackphoto