Mark, keep in mind my test likely still has some amount of veiling lens flare (no matter how well coated the lens). Hopefully not too much. I've always wanted to run the same tests I've always done but by contacting transmission step tablets so that I could see how much flare is in my test setup. As Stephen Benskin would remind us all, contacting is the only way to eliminate flare entirely and get truly "raw" H&D curves.