After he began his job in 1883, Weimar painted hundreds of the museum exhibits. These painting were used in the first "
Führer durch das Museum durch das Hamburgische Museum für Kunst und Gewerbe (Guide through the Hamburg Museum of Art and Design)". 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. At short time later, he began to produce
diapositive slides for guides to the museum collection. Around the turn of the century, he produced a photographic
herbarium for the museum, which was published in 1901. 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. In spring 1915, the museum gave this photographic collection its own exhibition. After it was invented in 1904, Weimar began to use the
autochrome method to produce colour photographs of the museum collection. Because of his technical and artistic skills, he was often asked for advice on similar projects at other museums, including the
Museum of Hamburg. 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. In 1915, he collected his detailed research about photography in Hamburg in the book "
Die Daguerreotypie in Hamburg 1839–1860 (The Daguerrotype in Hamburg 1839-1860)". The book is still held up today as both a pioneering work and as an authoritative work in the field. Together with Brinckmann, Weimar developed a special form of inventorying Hamburg's memorials and monuments. The novelty of their method was that, instead of the central feature of the description of the object being a written description, a photography was used instead. 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. Houses of this type are often called
Low German Houses in English works. 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. With the same skill and care, he also documented the 1906 building of the
Bismarck monument. In 1900, he had thoroughly documented the structures of
St. Michael's Church, which burnt down in 1906. Weimar's studies and photographs were the basis for the rebuilding work on the church. , with the engineers who designed it, Studer und Klemann, 1906 Up until 1912, Weimar continued to develop the art and science of his photography, taking 1200 photographic plates which he labeled with the place and date the photograph was taken, along with information on the time of day, the light conditions and what lens stop he used. Alongside the image he himself produced, Weimar systematically collected daguerrotypes. Because of Weimar's work, the Hamburg Museum für Kunst und Gewerbe could say that it hosted a world-leading collection of photographs. The largest part of the collection is now housed in the , which is housed in Bergedorf Castle, the only castle in Hamburg. The majority of the photographic collection is stored in what was formally the
magazine of the castle. Weimar was a member of the . His work features in the
Europeana Photography Collection. Hamburg Museum has also featured his work, particularly on the historical buildings of Hamburg. == Works ==