Why use the SpyderCUBE?
When creating digital photographs, you need to tell the software what the color
temperature of the image is, measured in Kelvin. Every light source has a different
Kelvin value, for example, the sun typically has a value of 5500-6500K while a
fluorescent light can be anywhere from 3200-7500K and your typical household
tungsten bulb can range from 2500-2900K and strobes are about 5200K. With such a
wide range of color temperatures in your everyday photographic environments, you
need a constant to show the software what neutral is.
The SpyderCUBE is also very useful in post processing to help set your contrast range
properly.