I have listened to all of the comments expressed here on how much the R Reznick e-book has helped everyone improve their photography and post processing. The result is that I recently purchased the e-book. This past weekend, I set about printing out the book, and reading through it. Everything went well until I got to the post processing section using NC. The problems that I am having have to do with such things as gamma indicators, gamma ramp and gamma plateau. Are these terms unique to this e-book? I have used Google to search the Internet for a definition, and I have not found it. Is there a theory behind these so called indicators? There is no real definition of these terms in the e-book. You have take it on faith that the points indicated in the examples are in fact valid points. That is all well and good for the examples, but I am completely lost when it comes to a real world histogram of one of my pictures. What am I doing wrong? I have spent over 42 years as an engineer, and I have a degree in physics. Maybe I am expecting too much, but right now I am at a loss to apply these techniques with any confidence. I am sure that all of you folks that have the e-book have a good understanding of what all of this means. I would really appreciate a better explanation of just what all of this means. Any help will be appreciated.