Neumüller is one of the most productive Austrian amateur photographers of the 20th century. In the 1920s, he began participating in numerous amateur photography exhibitions, which he continued to do until 1965. He collected 104 awards, including 33 gold medals in 15 different countries. His pictures were published in numerous photo magazines. Neumüller became known as a photo journalist through his publication »Praxis der Weichzeichnung« (Practice of Soft Focus) and founded the Linz School of Soft Focus Photography. Neumüller saw himself in the tradition of Heinrich Kühn, with whom he was in contact from the 1930s onwards. From 1927, he devoted himself to color photography and became an important promoter of color photography in Austria. He gave over 1,000 slide lectures.
Michael Neumüller was one of the most productive and best-known Austrian amateur photographers of the 20th century. He was born in Mauthausen in 1891 and began taking photographs on the South Tyrolean front in the Dolomites during the First World War in 1916/17. From 1919 he worked as a teacher in Linz (director until 1950) and received a license for landscape photography in 1924. In the 1920s, he began participating in numerous amateur photography exhibitions, which he continued to do until 1965.