Bill, I might be on my own here, but I don't think zone stickers, grey scales, power dials (whatever that is), BTZS etc really improve or add value to the Zone System from a printing perspective.
The Zone System (Adams/Archer) is an introduction to visualization, spot metering and sensitometry with the goal of eliminating some of the guesswork involved in making negatives that contain the information required to make a print that carries the desired effect. Print controls are then they key to extracting the information from the negative, which is why they should be considered when making the exposure in the field. A careful reading of Adams and this becomes clear. You can't make great prints by trying to make negatives that print themselves.
Considering the Zone System is an introduction to the system of controls and sensitometric transitions from subject to print, to me the logical extension of it is tone reproduction theory. If one truly wants to be able to "place" subject luminances on expected print tones (and we can debate the utility of that), I believe a study of Jones, tone reproduction diagrams etc. is the way to go. That is how to extend the Zone System. Of course, that inevitably involves gaining a better understanding of exposure as well (film speed for example).
Last edited by Michael R 1974; 04-30-2013 at 11:07 AM. Click to view previous post history.