The EzyBalance LR3050 is the largest in the range, perfect for larger subjects or groups, and enables setting of accurate grey balance and white points. Use it to set accurate exposure at the point of taking a picture, or take a reference shot with the Ezybalance included in the picture, and use the eyedropper tool in Photoshop to adjust the shot later. The same setting can then be applied to all photos taken under the same lighting conditions. It has an 18% reflectance surface. Two smaller sizes are available.