X-Rite ColorChecker Custom Grayscale Card
The GretagMacbeth ColorChecker Three-step Gray Scale card is a full size version of the white, 18% gray and black reference square used in the standard 24-patch ColorChecker. This target is scientifically engineered to provide a precise uniform surface that is spectrally neutral (reflects equal amounts of red, blue and green) in all types of light conditions. The photographer can now have confidence that the camera’s image is as close to real life as possible.
