These are matched , to screw onto the 52mm filter thread of the MAMIYA SEKOR 35mm manual focus FILM SLRs , the ones with the fixed , 50mm lens ...... they have a deep rear element that protrudes from the back , they will ONLY fit the camera stated because the fixed lens on the Camera , has a deep seated front element . In full working order . front caps , case and instruction sheet supplied . No optical fungus or scratches , some dust .... and the wide angle lens has a faintly mottled appearance under the front element when a torch is shone into it  . These lenses screw directly into the front of the lens , no adapter is needed .