Nikon 25464 D300S User's Manual - Page 377
Notes on Optional Flash Units Continued, Use Only Nikon Flash Accessories, SB-900, SB-600 and SU-800
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D Notes on Optional Flash Units (Continued) The SB-900, SB-800, SB-600, and SB-400 provide red-eye reduction, while the SB-900, SB-800, SB-600, and SU-800 provide AF-assist illumination with the following restrictions: • SB-900: AF-assist illumination is available for all focus points; with 17-135 mm AF lenses, 17-19 mm 20-105 mm 106-135 mm however, autofocus is not available with the focus points shown in gray. • SB-800, SB-600 and SU-800: With 24-105 mm AF lenses, AFassist illumination is not 24-34 mm 35-49 mm 50-105 mm available with the focus points shown in gray. With other flash units, the camera AF-assist illuminator is used for AF- assist illumination and red-eye reduction. In programmed auto, the maximum aperture (minimum fnumber) is limited according to sensitivity (ISO equivalency), as shown at right. Maximum aperture at ISO equivalent of: 200 400 800 1600 3200 5 5.6 7.1 8 10 D Use Only Nikon Flash Accessories Use only Nikon flash units. Negative voltages or voltages over 250 V applied to the accessory shoe could not only prevent normal operation, but damage the sync circuitry of the camera or flash. Before using a Nikon flash unit not listed in this section, contact a Nikon-authorized service representative for more information. n 351