Contains several important color and white balance tools in one accessory.

Inside one cover of the durable plastic case is a color test card with 8 color swatches for establishing a reference under various conditions. Inside the other cover is a neutral gray card. By including the gray card in the scene and metering its surface, the exposure will be accurate regardless of the lighting and subject contrast.

In the center of the ProDisk is a white balance filter that you hold in front of the camera lens to create a custom white balance for accurate color under the most challenging lighting conditions.

Includes neck strap for convenience, measures 4 x 5.5 x 0.4", stores easily in your camera bag.