This looks awesome! From an email: White Balance Lens Cap - Perfect White Balance in Every Lighting Situation One of the coolest digital camera accessories that I’ve come across lately is the White Balance Lens cap. I first heard about it from my friends over at Photojojo. The concept is simple. Rather than having to carry a Grey Card around with you or relying on post production to get White Balance right - you simply switch your camera into white balance mode and take a photo - with your lens cap still attached. Doing this tells your camera what kind of light you’ve got in the scene in front of you so it can make the perfect adjustment to take well balanced shots in that location. Here’s how the lens cap looks. The lens cap comes in quite a few sizes - for most popular lens diameters and will replace your current lens cap meaning you’ve always got it with you to take the perfectly balanced shot in all lighting situations. It also comes with a neutral and warm white dome so you have a choice of three ‘whites’ to suit different preferences. No more shots with yellow, orange or blueish tinges to them - just great shots. The lens cap costs between $45 and $65 - depending upon what size you need. Learn more about it and get your own at Photojojo.