This document, printed in 1976 contains a brief but concise and complete explaination of resolution and contrast in photogrpahic lenses. The document consists of four pages and contains some important photographs. These important photographs have been scanned along with the page on which they appear at a reasonable resolution to keep download time reasonable. But if you need a higher resolution copy of the photographs, links allowing the download of 5.0 Mb files of these images alone have been provided.