Hammer's visual art practice explores memory and the fluid, subjective nature of remembered reality. By combining photogravure, etching, photography, and video, she creates cinematic, dreamlike imagery that evokes a sense of nostalgia.

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Hammer explains "My images are not only of a lived reality: they are imagined memories rebuilt from collective experiences. I start from a photographic archive or subjects I am repeatedly drawn to —the light in the dark, the potential interaction of characters. The images are like scenes from a stage set, portraying a reimagining of past times and spaces.The settings are open to interpretation and filled with tension or expectation, the anticipation of what is about to happen."

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In 2024 her artwork, The Light Collector was awarded John Purcell Prize at the Woolwich Contemporary Print Fair 2024.