Have you ever had to adjust tens or hundreds of pictures one by one with slightly different colors? As you may already know this problem arises from incorrect color balancing. This happens for most digital SLR cameras operating with automatic white balance (AWB). Here is where this lens cap can help.Just like a typical white balance card, this lens cap also has a plain white surface. This white balance lens cap allows you to quickly and accurately obtain the correct color balance.Operation is simple, turn your camera into custom white balance mode and take a picture with this lens cap attached to the lens. It also has a standard screw thread for quick installation too.With this lens cap, you can obtain an accurate white balancing in all situations. Add this to your photography kit today!