German-born, Fiedler studied photography in various studios including that of his father and the master portrait photographers Rudolf Dührkoop and Hugo Erfurth. In 1920 after serving in the German Army during WWI, he set up his own studio in Dresden where he concentrated on portraits, nudes, reportage and photography for advertisements. During the 1920s he experimented with gum and carbon print processes and later oil and bromoil print processes. With the outbreak of WWII, Fiedler withdrew from public life and concentrated on technical photographic research. Sadly, the majority of his work from the 1920s-30s was completely destroyed in the 1945 air-raids on Dresden.