Agfa and Rodenstock

12 and 8 researched events on one shared scale. Agfa 1867–present, Rodenstock 1877–2013.

The axis stretches where either maker has research and collapses where neither does, so a year sits opposite the same year on both. Event counts differ because research depth differs, not because one company did less.

Vertical Horizontal Reading

Agfa1867–present · 12 events · 2 concurrent threads

Late 19th century-1925 1909-1936 1926-1939 1945-1957 1951-1963 1963-1970s 2005–present

Rodenstock1877–2013 · 8 events · 2 concurrent threads

1877-1880s 1950s-1960s

1 span collapsed, 6 years in total, where neither maker has a research point: 1984–1989. Collapsing keeps a short-lived maker readable beside a long-lived one; the years are removed from the drawing, never from the record.

Read either maker on its own: Agfa · Rodenstock