Nikon SB-R200 Wireless Speedlight Users Manual - English - Page 91

4 Autofocus flash operation in low light In Commander and Repeating flash operations, if light is too low for normal autofocus operation, the SU-800's AF-Assist Illuminator comes on, enabling you to perform autofocus flash photography. This is activated by a signal from the camera. • The AF-Assist Illuminator does not work in close-up flash operation. • The SU-800's AF-Assist Illuminator supports CLS-compatible cameras' Multi-Area Autofocus system. The effective shooting distance with the AF-Assist Illuminator: Approx. 1m to 10m (3.3 to 33 ft) with a 50mm f/1.8 lens or less, depending on the lens in use. Usable lens focal length: 24mm to 105mm Activating and canceling the AF-Assist Illuminator You can set the AF-Assist Illuminator to activate or cancel even when receiving a signal from the camera. Press the [MODE] + [W] buttons simultaneously for approx. 2 seconds to toggle between the AF-ILL (activated) and the NO AF-ILL (canceled). MODE NO AF-ILL AB SEL READY LOCK Notes on using the AF-Assist Illuminator • If the focus indicator does not appear in the camera's viewfinder even through the AF-Assist Illuminator is on, focus manually. • The AF-Assist Illuminator will not light up if the camera's autofocus is locked or the SU-800's ready-light does not come on. • Refer to your camera user's manual for more information. z Other functions 91