Camera O references early camera obscura technology and drawing to plot perspective, movement and activities in the sky, shingle and sea. SE Barnet and Jane Watt (as Blast Radius) installed a working camera obscura during a two-day residency in February 2025. They worked with a group of University of Suffolk Fine Art students to use the camera obscura as an instrument to observe the landscape. The result is a series of tondo (round) drawings made directly from the projected camera obscura image that were exhibited in the same building. The exhibited works vary in outcomes. Some employ quick and abstract, mark-making that capture the patterns of shingle, horizon lines, figures moving across the landscape and cloud formations.

In addition to the fixed camera obscura, the artists experimented with mobile hand-made versions. Experiencing this live image of projected light is magical. It is a technique that was originally invented by artists to aid perspectival drawing, later adopted in science and the development of photography, and used on Orford Ness in this Bomb Ballistics Building in the first half of the twentieth century to plot and gather data on bombing accuracy.