Adorama QpCard 101, 3 Cards with Black / Gray / White Colors used for the White Balance System of Digital Cameras. Reviewhttp://tinyurl.com/musjcqd Adorama QpCard 101, 3 Cards with Black / Gray / White Colors used for the White Balance System of Digital Cameras. Gray balancing of the light.18% gray field for balance and exposure adjustment.White-point settings.Black-point settings.Millimeter scale for size reference.
