The Calibrite ColorChecker 3-step Grayscale is a grey card for exposure and white balance control for photo and video from capture to edit An A4-sized grey card suitable for anyone working in a creative environment Uses the standard black, mid-tone grey (18%) and white patches used on the ColorChecker Classic target This calibration card scientifically engineered to provide a precise, uniform surface that is spectrally neutral (reflects equal amounts of red, blue and green) in all types of lighting conditions Ideal for any user that wants to maintain accurate neutral tones