On my Olympus TRG Camera which is a generation 5 the threads were not quite long enough to hold the universal ring far enough away from the camera body. SO... Scope Cam sent me the correct adapter for no charge and it works amazingly well matching my camera to all my optics from the old 20x50 Leupold Spotter to the big 65mm Leica Very stable and secure..quick on and off.. what's not to love?