This article discusses the sharpness of film and how it is measured using MTF curves.
MTF curves show the loss of contrast caused by light scattering within the emulsion during exposure.
A perfect reproduction would result in a horizontal line at 100%, even as the space between the light and dark areas decreases.
In reality, as the space between the light and dark areas decreases, the film’s ability to make the distinction between light and dark fails, and the percentage drops accordingly.
Here are some questions and answers about sharpness and MTF:
- What is sharpness in photography?
- What is MTF?
- How is MTF measured?
- What factors affect the sharpness of a film?
The answers to these questions can be found in the article.