This is a high quality C-Mount Lens to Sony NEX Mount Adapter. You can use this camera adapter ring in conjunction with the camera adapters to complete the connection to a digital camera supporting a filter thread.                                    Features            New and high quality<br>Allow focus to infinity， actually go beyond infinity a little<br>Lenses with max. near-thread diameter of 42mm all can fit without any modification<br>Lenses with near-thread diameter larger than 42mm (and smaller than 44.5mm) still can fit without any modification， although will not focus to infinity (but it will allow focus for up to 40 ~ 50 meters)<br>For some lenses， there will be vignetting with varied extent<br>                                                                                                Package Includes            1 x C-Mount Lens to Sony NEX Mount Adapter<br>