I wanted a device that can throw light patterns onto a wall or a model. There are some commercially available but they are quite expensive and I this was only for occasional use. I thought that this is something that can be 3D printed. I bought a Bowens mounting ring and some cheap macro extension tubes (For the Nikon F mount since I already have lenses for it) from eBay and designed an adapter between them.
The adapter that I made has slots for different kinds of gobos between the strobe and the lens