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Likewise, for TTL automatic flash photography with Nikon Speedlights, no adjustment is required. However, when the flash-to-subject distance approaches either the near or far limit of the automatic shooting range, the aperture may need to be adjusted slightly. When using a separate exposure meter or taking photographs in the non-TTL flash mode, select the appropriate aperture index according to the focal length setting in the following way (see Fig. B): The green aperture index is used for the 70 mm focal length setting and the yellow one for the 300 mm setting. Click stops are provided at the green aperture index with each aperture setting. For zoom settings between 70 and 300 mm, align the aperture ring between the two indexes to obtain the best possible overall exposure. Lens care • Clean the lens surface with a blower brush. To remove dirt and smudges, use a soft, clean cotton cloth or lens tissue moistened with ethanol (alcohol) or lens cleaner. Wipe in a circular motion from center to outer edge, taking care not to leave traces or touch other parts. • Never use thinner or benzene to clean the lens as this might damage the lens, result in a fire, or cause health problems. • To protect the front lens element, an NC filter is recommended at all times. A lens hood also helps protect the front of the lens. • When storing the lens in the lens case, attach both front and rear caps and set the lens' focusing ring to infinity (.). •When the lens will not be used for a long time, store it in a cool, dry place to prevent mold. Also store the lens away from direct sunlight or chemicals such as camphor or naphthalene. • Do not get water on the lens or drop it in water as this will cause it to rust and malfunction. • Reinforced plastic is used for some parts of the lens. To avoid damage, never leave the lens in an excessively hot place. Specifications Type of lens: D-type AF Zoom-Nikkor lens with built-in CPU and Nikon bayonet mount. Focal length: 70 to 300 mm Maximum aperture: f/4 to f/5.6 Lens construction: 13 elements in 9 groups Picture angle: 34°20' to 8°10' [22°50'– 5°20' with Nikon digital cameras (Nikon DX format); 27°40’– 6°40’ with IX240 system cameras] Focal length scale: 70, 100, 135, 200 and 300 mm Distance scale: Graduated in meters and feet from 1.5m (5 ft) to infinity (.) Focus/zoom control: Via two independent control rings Aperture scale: f/4, f/5.6, f/8, f/11, f/16, f/22 and f/32 Diaphragm: Fully automatic (minimum aperture [f/32] can be locked.) Exposure measurement: Via full aperture method Attachment size: 62 mm (P=0.75 mm) Dimensions: Approx. 74 mm dia. x 116 mm extension from the camera's lens mounting flange; overall length is approx. 125 mm Weight: Approx. 515g (18.2 oz) English Optional accessories 62 mm screw-in filters Teleconverter TC-201 Teleconverter TC-14A Hard lens case CL-72 Jp En De Fr Es It Ck Ch . ..... Aperture ring Blendenring Bague des ouvertures Anillo de aperturas Anello diaframmi . ........ Meter coupling ridge Steuerkurve Butee de couplage photometrique Pestana de acoplamiento del exposimetro Base di accoppiamento dell'esposimetro . ..../....(..) Aperture index /Mounting index (green) Einstellindex (grun) Index d'ouverture / Index de montage (vert) Indice de apertura / indice de montura (verde) Indice di apertura / indice di montaggio (verde) . ..F...... Aperture indexing post Lichtstarkenabgriff Index de couplage mecanique Vastago del indice de apertura Base per trasmissione dell'apertura . CPU.... CPU contacts CPU-Kontakte Contacts electroniques Contactos CPU Contatti CPU . .............. Aperture-direct-readout scale Skala fur Blenden-Direktablesung Echelle de lecture directe Escala de lectura directa de la apertura Scala diaframmi per lettura diretta nel mirino . AF...... AF coupling AF-Kupplung Couplage AF Acoplamiento AF Accoppiamento AF . .........(EE.....) Minimum aperture signal post (EE servo coupling post) Kontaktstift fur kleinste Blende (Belichtungsautomatik) Index de servo commande de diaphragme Vastago de senal de apertura minima (vastago de acoplamiento servo EE) Base di trasmissione del diaframma minimo (accoppiamento servo-EE) . .... Aperture scale Blendenskala Echelle des ouvertures Escala de aperturas Scala diaframmi . .......... Minimum aperture lock lever Verriegelung der kleinsten Blende Verrouillage d'ouverture minimale Palanca de bloqueo de apertura minima Leva di blocco al diaframma minimo . ......... Focal length index line Brennweiten-Indexlinie Ligne de repere des distances focales Linea indicadora de distancia focal Contrassegno focale . .... Distance scale Entfernungsskala Echelle de distance Escala de distancias Scala distanze . ...... Focal length scale Brennweitenskala Echelle des focales Escala de distancia focal Scala lunghezze focali . ........ Focusing ring Entfernungsring Bague de mise au point Anillo de enfoque Anello di messa a fuoco . ...... Zoom ring Brennweitenring Bague de zoom Anillo del zoom Anello zoom ........ 62mm...........