Focused plenoptic cameras have played an increasingly important role in fields like structure from motion (SFM) and scene reconstruction. However, the traditional SFM algorithms cannot be directly applied to focused plenoptic cameras due to the special structures of the cameras. In order to solve this problem, we proposed a complete equivalent multi-camera model of focused plenoptic cameras. On this basis, we employed the SFM algorithms of the traditional multi-camera to give the algorithm examples suitable for focused plenoptic cameras with regard to pose estimation and point cloud triangulation. Finally, the experimental results of simulations and real scene reconstruction verify the correctness of the equivalent multi-camera model and the SFM algorithms, further indicating that the SFM problem of focused plenoptic cameras can be equivalent to that of multi-camera.