http://www.betterlight.com/whitePapers.asp
and
For those that don't want to pay for ExpoDisc, this might be a good alternative:
http://www.rmimaging.com/products/graycard_index.html
and
http://www.rmimaging.com/products/minicc_index.html
and
For those that don't want to pay for ExpoDisc, this might be a good alternative:
http://www.rmimaging.com/products/graycard_index.html
and
http://www.rmimaging.com/products/minicc_index.html