User manual NIKON AF FISHEYE-NIKKOR 16MM F-2.8D

[. . . ] Because of the optical construction of this lens, it is necessary to keep a filter attached to the lens at all times. Using a fisheye lens requires much more e planning and thought about picture composition than does a conventional lens. [. . . ] If you use ether in cleaning the lens, a smudge sometimes appears on the surface of a multi-coated lens. If this happens, wipe it again with a cotton cloth moistened with alcohol. Never use thinner or benzine to clean the lens. Keep the lens cap in place whenever the lens is not in use. If you will not use the lens for a long time, protect it from rust and mold by storing it in a cool, dry place. Also, do not store in direct sunlight, and keep it away from naphthalene or camphor. Be careful not to get the lens wet or drop it in water. Reinforced plastic is used on the exterior of the lens unit; to avoid damage, take extra care to never leave the lens in an excessively hot place. Various interchangeable focusing screens are available for Nikon cameras to suit any type of lens or picture-taking situation. Those which are recommened for use with your lens are listed on page 24. [. . . ] When the main subject is a small, patterned subject or scene. A person standing in front of a distant background Eine Person vor einem weit entfernten Hintergrund Une personne debout sur un fond éloigné Una persona se encuentra delante de un fondo distante A field covered with flowers Eine blumenübersäte Wiese Un champ couvert de fleurs Un campo cubierto de flores 28), when the subject is highly patterned or of low contrast, such as a field covered with flowers, autofocus may be difficult to obtain. [. . . ]