I wasn't implying there was competition Ralph, rather that the text of the article with the BTZS spreadsheet helped explain it's uses. So as you say some documentation will help.
It would be interesting to relate the techniques use to the more practical visual testing of the Zone system as many don't have access to a densitometer.
It's a few years since I was really adept at spreadsheets bur it would be useful if some one could make the WBM one fully functional in Open Office.
Lee highlights why many of us stopped using Microsoft Office, in my case it was complex Access databases used commercially rendered completely useless in new versions of Office with no backwards compatibility.
Originally Posted by RalphLambrecht