I would assume that an understanding of the H&D curve would suffice.....
> By looking at the scene, and determining that the contrast range requires
> modifications in the development stage so you get the negative that prints like
> you want, and you *are* using the Zone system!
>
And I suppose when the sun comes up in the morning it's using the zone
system? Negative controls were common long before and entirely independent
of zone system. I think you're doing what might be called a "back
formation."
Judy