I received some files from a photographer for a job I'm doing in my graphic design business. They have a QP Card 201 embedded in the outside of the image. I have never heard of this card and trying to find what the patch definitions has wasted over an hour so far. There's software I downloaded but it looks like you have to be a programmer to understand it. All I want to know is which patch is the 50% gray out of the 30 smaller patches or 4 larger patches? On the larger white patches the white doesn't look white, the black doesn't look black and the two middle grays are a toss up. There are 7 gray patches in the 30 smaller patches (why not 10?). I don't think that's too much to ask and I can't believe it isn't documented somewhere. Thanks in advance.