BEASTGRIP DOF ADAPTER
The Beastgrip DOF adapter allows you to use some SLR lenses with your camera phone to achieve a shallow depth of field, similar to a DSLR camera. Please note: Using a DOF adapter is not simply "point and shoot" capable; it takes time and practice to achieve the desired effect. Beastgrip DOF adapters are designed and built to achieve the best possible results.
The Beastgrip DOF adapter is made of a tube with an SLR mount ring (Canon EF mount) on one side and a set of macro lenses on the other. Inside of the tube is a focusing screen mounted on a focusing screen holder. The SLR lens projects the image onto the focusing screen, allowing the camera phone to frame the intermediate screen by focusing in macro mode. The principle is similar to pointing a camera at a movie screen. The phone camera's only responsibility at this point is to record what is being projected onto the focusing screen. Additional information on DOF adapters and how they work can be found on wikipedia.