In the Sofa series Katarzyna Majak invited her friends to visit her place and pose on her sofa. She was the first artist in Poland to use the zone plate which is a lensless photography technique. The exposure time was approx. 20-25 minutes, she could research body and the result of its delicate movement, apearrance versus disapperance, on the black and white negative. "A zone plate consists of radially symmetric rings, which alternate between opaque and transparent. It works by blocking rays of light, which diffract around the Fresnel zones and, as a result of the interference, dim parts of the image." (Katarzyna Majak, Zone Plate, Fotografia quarterly 11/2003). The resulting images have the softness of pinhole photography and show a characteristic halo effect.