Legendary in the world of close-up photography, superior Micro Nikkor performance delivers images of striking clarity while providing reproduction ratios of up to 1: 1 without additional accessories.PRODUCT FEATURES:The extra long focal length of this lens provides the most versatile working distance;Extra Low Dispersion (ED) glass ensures apochromatic-like performance, with high contrast and sharper images;ED glass has been incorporated into selected elements for superior optical performance;Internal focusing improves handling and focusing operation;Focuses from infinity to 19.4 inches (1: 1 reproduction ratio);A-M (Automatic-Manual) switch.