Designed specifically for the Sony 14mm F1.8 GM lens, this Haida M10 Adapter Ring is made to be used in conjunction with the M10 filter holder and has been designed to hold two square 100mm filters and is able to rotate a full 360 degrees. Use of the filter holder is easily accomplished by first sliding the adapter ring over the front of the lens until it has achieved a secure fit. Both durable and lightweight, the adapter ring is constructed from aluminum alloy.