After 1890, he began to use halftone reproduction methods which enabled him to produce half-tone pictures of exhibits for use in books and newspapers.
Between 1897 and 1917, this wealth of botanical information, with its excellent sense of composition and beauty was an important resource for leaves, plants and flowers.
After it was invented in 1904, Weimar began to use the autochrome method to produce colour photographs of the museum collection.
Weimar was one of the first to document the beginnings of photography as an art-form and the history of photographic ateliers and their masters, particularly in Hamburg.
Together with Brinckmann, Weimar developed a special form of inventorying Hamburg's memorials and monuments.
Brinckmann also tasked Weimar with not just capturing the statues in the inner city of Hamburg but also those in surrounding region, where they were in far greater danger of being forgotten and lost.
At that time, the wider region of Hamburg still had a lot of older reed-thatched houses, which contained objects that it was vital to catalogue but often fell victim to fires.
Weimar produced many photo-series of the houses and churches of the Vierlande and Marschlande, part of the Bergedorf region of Hamburg, which he catalogued accurately and in great detail.
Because of Weimar's work, the Hamburg Museum für Kunst und Gewerbe could say that it hosted a world-leading collection of photographs.