Canon Macro photo coupler FL 48mm (Gar Shelf#11 Box#14 Item#2) Fits Canon FL 48mm front lens filter thread thread Fits FL 50 f1.8 Canon lens which uses 48mm filters Your lens needs a 48mm filter size and your lens is then mounted backwards onto this coupler The coupler then mounts to your camera body This was originally made for a 50mm 1.8 FL lens but which model year I do not know Tested Clean As pictured |