In 1980, the world of photography was a very different place. Film was the undisputed medium and photography's elder statesman Ansel Adams was still alive. Those who discussed pixels, color space and resolution were typically PhD's who were working for R&D facilities or the military. Outside of shooting Polaroids, the average photographer couldn't fathom the ability to shoot and instantly see the results as a high resolution, full color image.
Back In 1980, George Wallace was one of those photographers, and he had an idea. An avid fan of Ansel Adams and the zone system, Wallace dreamed of making a device that would work as a simple converter -- making the average camera and lens into an incident meter. Little did Wallace know that years later, his idea would start a revolution in the field of digital imaging by making a product that balances color nearly perfectly each time it's used.
Wallace died in 2001, never seeing his invention come to its full modern fruition. His daughter, Diane Wallace, who is an art historian and amateur photographer, wanted to see his invention grow, and in a chance conversation with a forum of photographers, Wallace realized that what her father had invented was more useful to digital photographers than film-based zone system enthusiasts. So, Wallace and her family began the process of refining the disc for the digital age. Read the whole review here