Nikon 20mm f/2.8 AIS Super NIKKOR Lens

The Nikon 20mm f/2.8 AIS Super Wide Angle Manual Focus NIKKOR Lens is a versatile ultra-wide angle lens for general photography. It has a compact ultra-wide angle lens construction and 94 degree picture coverage with edge-to-edge sharpness (70 degree with Nikon DX format). Its Close-Range Correction (CRC) system provides high performance at both near and far focusing distances. Close-Range Correction System The Close-Range Correction (CRC) system is one of Nikon's most important focusing innovations, for it provides superior picture quality at close focusing distances and increases the focusing range. With CRC, the lens elements are configured in a "floating element" design wherein each lens group moves independently to achieve focusing. This ensures superior lens performance even when shooting at close distances. The CRC system is used in fisheye, wideangle, Micro, and selected medium telephoto NIKKOR lenses. Super Integrated Coating ensures exceptional performance To enhance the performance of its optical lens elements, Nikon employs an exclusive multilayer lens coating that helps reduce ghost and flare to a negligible level. Nikon Super Integrated Coating achieves a number of objectives, including minimized reflection in the wider wavelength range and superior color balance and reproduction. Nikon Super Integrated Coating is especially effective for lenses with a large number of elements, like Nikon's Zoom-NIKKOR lenses. Also, Nikon's multilayer coating process is tailored to the design of each particular lens. The number of coatings applied to each lens element is carefully calculated to match the lens type and glass used, and also to assure the uniform color balance that characterizes NIKKOR lenses. This results in lenses that meet much higher standards than the rest of the industry.