Obscura Camera images Simultaneous transpositions started close to 1987 when I had designed a tent camera obscura. The tent was inspired by an old engraving showing Kepler tracing a landscape. There is close to a hundred photographs altogether grouped into two major themes: architecture and landscape. Visually, we have the impression to see two superimposed images. The ground under the tent is simultaneously photographed with the landscape projected by the camera obscura .