The B+W Series 8 KB6 Filter helps reduce the reddish color that registers on your photographs especially when images are shot during sunrise or sunsetIt can be used to retain the original color of the imagesThis filter is the perfect choice for "under-corrected" filtering of artificial light on negative filmsWith this cooling color conversion glass filter , you can increase the color temperature from 4100-5500° in order to remove the orange color cast from the negative films