Uh, the title says it all.

Yeah, this is for all you digital SLR photographers out there. You know white balance can be a big thing. Especially when you're doing a bunch of shots. So, any way to make it easier for your DSLR to auto-correct white balance is a good thing. Thanks to PhotoJoJo, you can get the white balance lens cap which helps you do just that.

Seriously, I first saw this in a DVD tutorial on lighting techniques at my RitzU classes and I thought it was the slickest thing since sliced bread, but I haven't been able to find one. Now, that's been solved. Yea!