toland innovated extensively on "citizen kane", creating deep focus on a sound-stage, collaborating with set designer perry ferguson so ceilings would be visible in the frame by stretching bleached muslin to stand in as a ceiling, allowing placement of the microphone closer to the action without being seen in frame. he also modified the mitchell camera to allow a wider range of movement, especially from low angles. ″it was toland who devised a remote-control system for focusing his camera lens without having to get in the way of the camera operator who would now be free to pan and tilt the camera."