Get accurate color in difficult lighting with the ExpoDisc White Balance Filter, the fast and easy digital white balance filter. Spend more time shooting and less time on workflow. 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 photographers today.
The ExpoDisc can effectively be used with step-up or step down rings, so if you use lenses with varying filter size specifications you can buy one ExpoDisc for your lens and appropriate rings for additional lenses.