White balance. On digital cameras you can select from a variety of white balance settings (e.g. Daylight, Cloudy, Shade). When shooting DNG, it's not that important since you can change it during import - but if you are shooting a series of photos in similar light, it's worthwhile to select the proper white balance so you don't have to change every image you import and because the "Auto" setting might set the exact balance differently between them all. Shooting JPEG, it's important to select the proper white balance before shooting!