[. . . ] Before using you new lens, please read the following carefully so that you can get the most out of you lens now and for years to come. [. . . ] Slide the lock lever in the direction of the aperture ring to align the white dot on the lever with the orange dot. Various interchangeable focusing screens are available for Nikon F6-, F5-, F4- and F3-series cameras to suit any type of lens or picture-taking situation. Those Which are recommended for use with this lens are listed in the table To remove dirt and smudges, use a soft, clean cotton cloth or lens tissue moistened with lens cleaner (separately availavle). Wipe in a circular motion from center to outer edge, taking care not to leave traces and not to touch the other lens parts. â· To proect the lens surface from dirt or damage, the use of an NC filter is recommended at all times. To protect the lens surface from dirt or damage, replace both the front and rear caps whenever the lens is not in use. â· Do not splash water on the lens or drop it in the water because this will cause it to rust and malfunction. â· If you will not use the lens for a long time, protect it from rust and mold by storing it in a cool, dry plce. [. . . ] When using the B2/B3, E2/E3 and K2/K3 focusing screens in cameras other than those listed above, refer to the columns for the B, E and K screens. [. . . ]