The first of these, Hektor, gave his name to a series of Leica lenses, and the name of the second appeared in the SummaREX. Professor Berek had two dogs, Hektor and Rex. The third group was simplified to two cemented elements, which was easier and cheaper to make. By 1925, the Leitz laboratories had produced glasses with improved optical properties, and Professor Berek designed an improved version of the ELMAX named the ELMAR that had four elements in three groups. When the Leica was first vended, this lens was renamed the ELMAX, for E Leitz and MAX Berek. Unlike other triplets, the Leitz Anastigmat has the diaphragm between the first and second elements. The lens has five elements in three groups-the third group being three cemented elements-and was initially named the Leitz Anastigmat. The first Leica lens was a 50 mm f/3.5 design based on the Cooke triplet of 1893, adapted by Max Berek at Leitz. Barnack resorted to a Leitz Mikro-Summar 1:4.5/42 mm lens for the prototype, but to achieve resolution necessary for satisfactory enlargement, the 24x36 mm format needed a lens designed specially for it. Barnack tried a Zeiss Tessar on his early prototype camera, but because the Tessar was designed for the 18×24 mm cine format, it inadequately covered the Leica's 24×36mm negative. To make large photos by enlargement, (the 'small negative, large picture' concept) requires that the camera have high quality lenses that could create well-defined negatives. īarnack conceived the Leica as a small camera that produced a small negative. After the planning of Jean Schmidt, contractor Robert Schneider built a four-story building in 1911. Only a few years later, Leitz again demanded the construction of a tall building. The mansard's floor expanded as production and workers also increased. On either side of the central building there was a hip roof that had high ceilings.
The fourth floor is visually separated from the lower part of the building by a very distant cornice. Narrow wall patterns and lightly embedded parapets summarize the three lowest floors. The four-story building is divided into six groups of windows, each of which has three windows. However, in the same year, it was decided to use the new construction of concrete skeletons and a simpler façade design. The first plans of the architect Jean Schmidt in 1907 show a brick building on a stone base, which was covered by a sloping roof and a slate roof. The oldest part of this row of tall buildings is now hidden by a new building at the Schützenstraße. It was in the turn of the century, when the production of optical devices expanded so much that it originated the first skyscrapers in the city of Wetzlar.
0 kommentar(er)
