The “C” in the lens description stands for multi coating. A super-wide angle lens (84° picture coverage) with a highest speed of f/2.8, with an automatic diaphragm. 9 elements in 7 groups. Automatic correction of image quality at close distance is an outstanding feature of this lens. Coupled to the focusing ring, the device ensures satisfactory performance over the entire focusing range, from infinity to the closest distance of 0.3m. Accepts standard Nikon 52mm filters, sold separately.