This accessory is inspired by the technique freelensing, lens free. It 'used to give the photo an effect of light scattering with a slight Bokeh effect. The freelensing you are releasing the lens from the camera and tilting it a bit 'to the right or the left. The "joint extensor" plans to do the same job but in total safety, preventing the entry of dust on the sensor or dropping out of hand lens.
In practice, the extensor joint is an extension tube with attachment for camera and lens, the lens is tilted to the right or the left. The implementation is very simple, fast and very affordable costs.
All the material in order to achieve the extensor joint is available in the section Download.