Zone plate images are lensless photographs made using defraction. The typical glass or plastic lens uses refraction to reduce the world to fit inside your camera. A zone plate is made of concentric rings (think Dante's Inferno) that bend light as it passes over the edge of the rings. The image is soft and thickly atmospheric. Beautiful dream-like images are possible.
Typical zone plate.
The math involved in creating a zone plate is quite involved. Accuracy can produce zone plates in a variety of focal lengths similar to your camera's lenses.
11 x 14 giclee on Epson Media
EXHIBITIONS: SoHo Photo Ridgefield Guild of Artists