Mount fisheye add-on lenses, filters and other threaded accessories on your 82mm camera lens. This adapter ring converts your camera's 82mm front thread to a different thread size, making it especially useful for mounting fisheye add-on lenses that don't match your camera's original filter diameter. Simply screw the adapter onto your camera lens, then attach your fisheye or other threaded accessory. Made for lenses with an 82mm front thread Ideal for mounting fisheye add-on lenses Also works with ND, UV, CPL filters and other threaded accessories Step-up and step-down sizes available Lightweight aluminum alloy construction 0.75mm thread pitch Simple screw-on installation