Filter-Focused Photo Editing for Mac and PC. What does “filter-focused” photo editing mean? It means that CameraBag Photo has the advanced tools you need to make your images look just how you want, but in an interface that makes it incredibly easy to re-use the styles you develop as custom filters. Or to start with existing presets to emulate classic film stock, or to batch apply the same style to hundreds of photos. It means that CameraBag is built from top to bottom to help you develop a unique photographic style that is distinctly your own.