Here is a summary or excerpt from an article that has just been published on DPNow:

ExpoImaging, Inc., designers of innovative camera accessories for the photographic market, today introduced the patented ExpoDisc 2.0 Professional White Balance Filter, an incident light metering filter for digital cameras, for both still and video applications.
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ExpoImaging, Inc., designers of innovative camera accessories for the photographic market, today introduced the patented ExpoDisc 2.0 Professional White Balance Filter, an incident light metering filter for digital cameras, for both still and video applications.
###
Click here to read the whole article...