For me one of the most interesting genres in photography is close-ups. Close-up pictures allow us to see a hidden world. For taking close-up pictures I use my father's old lens for FED cameras. To gain a great magnification some extension rings are used. To make this system work with my Canon EOS camera I use adapters. So the whole constructions appears to be: 35mm FED Lens , adapter to connect Fed M39 thread with M42 thread, which is used in extension rings, extension rings, adapter to connect rings to EOS. Results: