This paper presents an experience of a Photo Workshop, developed in a public hospital in Brazil. Then, the methodological proposal of the Clinic of Activity makes use of the resource of digital photography, making the photography production process a process of the analysis of the activity as well. The next step was to take the pictures produced and put them in discussion, in a dialogue about the activity that is developed around the collective modes used in the process and their controversies. In presenting this experience, we seek to develop a tool for analysing the work which exploit and destabilize the established modes of working and also enhance instituting forces that make up a given situation, engendering other ones that enable the expansion of workers' action power.