Designed to help digital photographers easily & efficiently achieve accurate, consistent colour results by providing quick reference points to balance colour & establish optimum lighting from the start of a photo session. Aimed at the professional & high-end prosumer photographers as well as professionals in the video cinematography & graphics arts markets. Because the perceived colour of white can change based on ambient lighting conditions both in the studio & outdoors, achieving optimal white balance is an important factor in accurate colour reproduction. The new Gretag Macbeth Color Checker White Balance card will help digital photographers adjust the digital camera's colour sensitivity to exactly match the ambient lighting conditions that the camera sees & ensure that the camera's raw image is as close to real life as possible. The Gretag Macbeth Color Checker White Balance card is a full size version of the white reference square from the standard, 24-patch Color Checker that has been scientifically engineered to provide a precise uniform surface that is spectrally neutral in all types of light conditions.