White Balance Lens Cap

This seems so obvious now that I've found it!

Take the guess work out of your photo's white balance post-processing with this White Balance Lens Cap. Put your camera in White Balance mode and snap a picture with the lens cap still on the camera. The camera does the rest of the wo

rk, adjusting the white balance to get true to life colors in your pictures. Especially helpful if your camera allows for white balance adjustment but does not take pictures in RAW format.

The handy lens cap replaces your old one, takes no additional space and does not get lost in your camera bag. Fortunately, it comes in a variety of sizes: 52, 55, 58, 62, 67, 72 and 77mm. Pick one up here.

via