The Falcon Eyes White Balance Cards are gray cards that allow you to easily measure the color temperature for a manual white balance anytime and anywhere. This way, you can set your DSLR camera to the exact color values, resulting in correctly exposed images without any color casts. In addition to directly adjusting the white balance on a DSLR camera, you can also take a reference shot for later editing of digital photos. The gray cards are made of compressed cellulose and have two sides, one gray and one white. This means that regardless of the lighting conditions, you always have the same level of reflectivity and accurately represent the color temperature. You don't need to be a professional to work with these cards. The set includes two gray cards in different sizes and is suitable for RAW, JPG, and TIFF recordings. The cards are water- and scratch-resistant.