Shoot arresting photos with rich, vibrant colors with help from these Insignia™ NS-DWB3M white, black and gray white balance cards, which promote lifelike color reproduction and are made of tough plastic material for shooting inside or outdoors.
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The included gray card look a little off to me based on my memory of Kodak 18% gray cards. I tested it with a spot meter, comparing it against a Calibr8 chip chart gray patch, sure enough, it reflects approximately 1.5 stops more light than it should.