The Spyder Cube is like a super-enhanced grey-card for the exposure conscious photographer! Simply include the SpyderCube in the first of a series of photographs and use it as a guide to calibrate the exposure, colour and white balance of all the images when processing them.
Unlike a traditional grey card the Spyder Cube can be used to determine colour temperature, highlight and shadow points, and is spectrally neutral so can be used under any lighting conditions.