This is an A4-sized semi-gloss photography target with 140 colour patches, including the original 24-patch ColorChecker colours for colour calibration and ICC profiles. It has extended skin tone patches for greater tonal separation, and the outer edge uses white, black and neutral for evenness of lighting assessment and white balance. The colour chart can be used with the ColorChecker Camera Calibration software to create ACR or ICC profiles and perform extensive colour analysis for correction. The Calibrite ColorChecker Digital SG is an important photography accessory to have in your kit to obtain the widest colour gamut available. X-Rite Inc. have transitioned their photo and video portfolio to Calibrite.