By "placing" a specific shadow area on Zone III (where texture begins) and "falling" the highlights on Zone VII or VIII, Adams could ensure that his negatives captured the full range of light, even in the harshest midday sun. Why Digital Photographers Search for "The Negative" PDF
: Practical application of light meters and aperture/shutter settings. The Zone System : Detailed mapping of tonal ranges. ansel adams negative pdf work
The "perfect" image you see was not how the scene looked in reality. It was a manipulation of the negative to serve his previsualization. By "placing" a specific shadow area on Zone