Richard, a question for you. The published curves for MG IV show Grades 00-3 having their straight-line sections all cross at a point differently than MCC110. MCC110's published curves all meet at the mid-tone density. Secondly, the toe and shoulder of MG IV is not equal to each other, whereas the published graphs of MCC110 show them to be more uniform.
How does the ZoneMaster II address toe/shoulder or does it assume linearity? In my own testing during the calibration of the papers, I find the published curves to reasonably match my own experience with the papers, but haven't quite figured out how the ZM2 calculates the outer most dots on the scale which would fall into the toe and shoulder.
During the calibration process for the ZoneMaster II, we set the white point first with offset, then the black point with contrast. (simplified description). Because the toe and shoulder of the papers is not the same the midpoint ends up sliding around a little bit. Essentially, there is a gamma offset to the papers.
Can you give me an idea how the ZoneMaster II deals with this and should I be determining my offset not with the "just off white" but maybe the midtone gray?