The Dagor was Goerz's most renowned lens construction, a symmetrical Anastigmat with 6 elements in two groups. It was designed by Emil Von Höegh who also had tried to win Zeiss as its maker. In 1892, after Zeiss' negative reply, he had luck that he could replace the chief lens designer of Goerz who had recently died.
Dagor was the abbreviation for "Doppel-Anastigmat GOeRz". Production licences were given to lens maker Ross in London and optician Karl Fritsch in Vienna.
- about Von Höegh on Google, excerpt from "A history of the photographic lens" of Rudolf Kingslake