-
November 2018. DE
patennt 620538, Hans Schulz, "Abänderung
eines Weitwinkelobjektivs (Modification of a wide-angle lens)",
issued 23
October 1935, ****igned...
-
granted 25
October 1955.
Erhard Glatzel and Hans Schulz,
Dreilinsiges Weitwinkelobjektiv. (Triplet Wide-Angle Lens.) West
German Patent #1,241,637; granted...
- f/4.5, and f/3.4 lenses.
Biogon (II)
retrofocus development AEG
Weitwinkelobjektiv (1932), from DRP 620,538
Zeiss Sphaerogon by Merté (1935), from US 2...
-
Application 1241637,
Erhard Glatzel & Hans Schulz, "Dreilinsiges
Weitwinkelobjektiv [Three-lens wide-angle lens]",
issued 1 June 1967, ****igned to Carl...
