This Nippon Kogaku 3.5cm f3.5 W-Nikkor C is a wide angle lens for the Nikon S mount. In very good cosmetic condition, with light finish wear. Focusing and diaphragm are good, though there's a touch of wear on the blades. Couple of internal marks from a previous cleaning, and a few larger specks of dust- nothing that will affect imaging, but the glass is not perfectly pristine. A good little lens in working order.