LEE Filters 100mm System 67mm Wide Angle Adaptor Ring\n\nThe adaptor ring is crucial to the LEE Filters system.\n\nIt screws onto the camera's lens and, in turn, the filter holder clips onto the adaptor ring.\n\nThe wide angle adaptor ring is suitable (although not exclusively) for use with wide angle lenses (wider than 24mm).\n\nIt differs from the Standard Adaptor Ring by sitting closer to the front element of the camera\u2019s lens.\n\nAs a result, the likelihood of vignetting is dramatically reduced.\n\nTo work out which ring you need check your lens instruction manual, inside the lens cap, or online to find out the thread size for your lens/es/\n\nOnly for use with LEE Filters 100mm System Holders.