This is a mint, 180 degree, view fisheye lens for a crop sensor Sony and related cameras. As the images show, looking, for example, at the flange surfaces, it is unblemished. It has been attached to a camera only a handful of times. It comes with a removable shade which offers minimal protection for the protruding, vulnerable front element. There is no provision for a protective filter. Note that the front element is unblemished. (It has been well protected.) When the shade is removed the size of the image increases. (I forgot that a few times and was briefly puzzled by the resulting smaller visible image circle.) It is a very accurate lens designed for very wide angle scientific measurements that are beyond this amateur photographers skill. For me it has been a very interesting lens giving a unique, very high resolution, perspective view with super close focus (5.3") and incredible depth of field. This lens also, amazingly, includes HSM auto focus. It currently sells discounted, new, for about $800. It carries serial #12390208 and will ship in its original box inside another larger protective box.