Hi Sheiky
A bellows is used to elongate the distance between the lens and the camera body. It looks like an accordeon, with the camera body on on side, and the lens on the other. That can give exceptional macro shots, but since the distance from the body is quite large when fully extended, a flash mounted on the body will not be sufficient. To increase the height of the flash, and soften the light, I tilted the flash and bounced on the built-in white "flap". The results on the first tests were quite OK.
I also plan to use this to digitalise my old slides.
I'd show you some pictures, but I can't get it to work right now [], perhaps some maintenance is going on.
Lars