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Working with blocking filters had its heyday in the purely analog era. Due to the wide dynamic range of digital sensors and, above all, the possibilities of image processing, the topic has been somewhat forgotten. But in times when AI & Co. are becoming more and more popular, many photographers are going back to basics. These color filters serve the purpose of blocking certain colors from an image, because not every colored light can enter through a filter. These filters are available in a wide variety of colors, the following are common: Green, red, orange, yellow and blue.
