Sensinometry
Sensitometry is the scientific study of light-sensitive materials, especially photographic film. The study has its origins in the work by Ferdinand Hurter and Vero Charles Driffield (circa 1876) with early black-and-white emulsions. They determined how the density of silver produced varied with the amount of light received, and the method and time of development.
Then came the 'zone system' = how to render light subjects as light, and dark subjects as dark and allowing for tonal gray gradation.
One of my favorite photos which spans all the zones delightfully is 'Silverton' 1951 by who else -- Ansel Adams...
--- and I quote photographer Margaret Bourke-White;
"The beauty of industry"
Sensinometry
Sensitometry is the scientific study of light-sensitive materials, especially photographic film. The study has its origins in the work by Ferdinand Hurter and Vero Charles Driffield (circa 1876) with early black-and-white emulsions. They determined how the density of silver produced varied with the amount of light received, and the method and time of development.
Then came the 'zone system' = how to render light subjects as light, and dark subjects as dark and allowing for tonal gray gradation.
One of my favorite photos which spans all the zones delightfully is 'Silverton' 1951 by who else -- Ansel Adams...
--- and I quote photographer Margaret Bourke-White;
"The beauty of industry"