Quote Originally Posted by nworth View Post
As noted above, reciprocity takes its toll, and you often do have to adjust time and contrast for the larger size.

Is it possible to make a generalized statement, say if I am going larger and have a mathematically derived exposure time dodge/burn time, and a given contrast, which direction I will likely need to adjust?

With my very limited experience, larger I went, I had to increase the contrast and reduce the exposure. I did this with a fairly low key image and spent significant amount of time and material to arrive at this "conclusion."