Step by step, Leitz engineers continued to expand the small format system. In 1935, another focal length was added with the release of the Hektor 28 mm f/6.3.
In those days, the construction of a wide angle lens represented an exceptional technical challenge, with f/6.3 being the maximum aperture that could be achieved in small format at this focal length. Nevertheless, at open aperture the lens offered an image quality which, by today's standards, would still be considered satisfactory.
Leitz kept the Hektor 28 mm f/6.3 in their catalogue until 1953.