Pentacon / Praktica and Rollei

13 and 10 researched events on one shared scale. Pentacon / Praktica 1919–present, Rollei 1920–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

Pentacon / Praktica1919–present · 13 events · 3 concurrent threads

Kamera-Werkstaetten opens in Niedersedlitz Praktica adopts the M42 mount Pentacon combine absorbs neighboring traditions L series industrializes the metal shutter B bayonet starts a new system Schneider successor finishes the BX line Praktica trademark outlives Dresden cameras

Rollei1920–present · 10 events

1920-1927 1928-1936 1937-1945 1946-1955 1956-1965 1966-1975 1976-1986 1987-2003 2010–present

Read either maker on its own: Pentacon / Praktica · Rollei