Rubuta ci gaba don wannan sakin layi - An fadada kayan aikinta don haɗawa da hotunan tsirara da rawa ta zamani kuma a cikin shekarun 1930, Katz na ɗaya daga cikin shahararrun masu daukar hoto a Vienna. Ta shiga cikin nune-nunen zane-zane da yawa kuma ta jawo hankalin ɗalibai. Daga cikin waɗanda suka yi nazari da ita sun haɗa da Hans Popper (daga baya aka san shi da John H. Popper), da kuma Anton Josef Trčka. Sa'ad da 'yan Nazi suka soma sarauta a farkon shekara ta 1938, da farko an ƙyale Katz ya ci gaba da koyarwa. Har sai da "Kristallnacht"
", ta ci gaba da koyarwa kuma an ba ta izinin samar da hotuna ga yahudawan da suka yi hijira. Saboda tana da izinin shiga cikin kasuwanci, ba a sanya ta a karkashin kulawa ba kuma ta sami damar kawar da kasuwancin ta kuma ta watsar da wuraren a ƙarƙashin sharuɗɗan hayar ta a ranar 30 ga Afrilu 1939.