Agfa and Voigtländer

12 and 8 researched events on one shared scale. Agfa 1867–present, Voigtländer 1756–present.

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 2005–present

Voigtländer1756–present · 8 events · 2 concurrent threads

1756-1839 1876-1914 1920s-1939 1970s-1980s 1999–present

2 spans collapsed, 26 years in total, where neither maker has a research point: 1850–1866, 1990–1998. 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 · Voigtländer