In the photographic series The Rectangle's Sharp Stare Källman has turned her gaze towards closed rooms such as prison cells, exploring the idea that they resemble a camera in the way that they subject light to control, only allowing it in under certain circumstances. Using this as her point of departure, she explores spaces from a very fundamental, immediate, and physical perspective. What emerges from the darkness? What does the privilege of being able to choose where you want to be mean? What happens to a person when their ability to act is limited to the very narrowest of spaces, when their choices are minimized? The images carry the same atmosphere of surveillance that is prevalent in many of Källman's series, a feeling of being unwillingly or unwittingly watched. By using simple means such as light, reflections, sound, rhythm and space, Källman conveys a feeling of humanity as something limited; a shackled spirit whose strength and individuality have nonetheless remained intact.