Main Features: Make Ai F mount lenses can be used for Fujifilm X cameras (X-Pro1, X-E1, X-E2, X-M1 etc) There is no ROM connection on the ring so diaphragm control of the lens is set manually It is possible to use Macro rings and other accessories Allows focus infinity Material: Made of aluminum Item Description： This adapter gives you the ability to use your irreplaceable prime lens and saves you the cost of purchasing new lenses The adapters are precision made to insure the per