Lot 9: Dr. Kenneth S. Tydings Instant-Reading Lens-Testing Chart, Mid-20th Century

A vintage Dr. Kenneth S. Tydings ‘Instant-Reading Lens-Testing Chart,’ a specialized technical tool for evaluating photographic lenses. Likely dating from the mid-20th century (approximately 1950s-1970s), this large printed paper chart features numerous radial and linear resolution patterns, numerical indicators, and instructional text such as ‘RESOLUTION TESTING INSTRUCTIONS’ and ‘What To Expect From Your Lens,’ with mentions of ‘Kodak Plus-X’ film. The chart is mounted onto a rigid backing, possibly wood or particle board, exhibiting visible framing along some edges.
Height: Approximately 25 inches (63.5 cm)