SpyderChecker The other new calibration solution from Spyder is designed to make sure the color in your photos is as accurate as possible. A foldable case holds two cards. One side shows off resin squares of specific colors, while the other side acts as a gray card. Since the squares aren't cardboard or painted, they last and retain their accuracy much longer. The red box in the bottom left corner of the Checker will eventually fade to yellow, signaling that it's time to order more color cards. To use the calibration tool, you simply take a photo of the Checker in the light you're shooting with and use Lightroom or Photoshop to correct your color settings. The results we saw in the demo were impressive and the process only takes a few minutes from start to finish.