Get accurate color in difficult lighting situations with the patented ExpoDisc white balance filter. Simply read and set white balance with the ExpoDisc in place before shooting and you’ll reduce or eliminate the need for post-capture color adjustments. Get the white balance solution that is quickly becoming the preferred method of achieving accurate color balance for professional and serious photographers today. * Fine tune color at point of capture * Works in mixed, or difficult lighting conditions * Replaces your gray and white cards * Spend more time shooting and less on workflow * It’s convenient, fast and easy-to-use