Nikon Nikon Df Product Manual - Page 138

The Nikon Creative Lighting System (CLS) Nikon's advanced Creative Lighting System (CLS) offers improved communication between the camera and compatible flash units for improved flash photography. ❚❚ CLS-Compatible Flash Units The camera can be used with the following CLS-compatible flash units: • The SB-910, SB-900, SB-800, SB-700, SB-600, SB-400, SB-300, and SB-R200: Flash unit Feature SB-910 1 SB-900 1 SB-800 SB-700 1 SB-600 SB-400 2 SB-300 2 SB-R200 3 Guide No. 4 ISO 100 34/111 34/111 38/125 28/92 30/98 21/69 18/59 10/33 ISO 200 48/157 48/157 53/174 39/128 42/138 30/98 25/82 14/46 1 If a color filter is attached to the SB-910, SB-900, or SB-700 when v or N (flash) is selected for white balance, the camera will automatically detect the filter and adjust white balance appropriately. 2 Wireless flash control is not available. 3 Controlled remotely with optional SB-910, SB-900, SB-800, or SB-700 flash unit or SU-800 wireless Speedlight commander. 4 m/ft, 20 °C (68 °F), SB-910, SB-900, SB-800, SB-700, and SB-600 at 35 mm zoom head position; SB-910, SB-900, and SB-700 with standard illumination. • SU-800 Wireless Speedlight Commander: When mounted on a CLScompatible camera, the SU-800 can be used as a commander for remote SB-910, SB-900, SB-800, SB-700, SB-600, or SB-R200 flash units in up to three groups. The SU-800 itself is not equipped l with a flash. A Guide Number To calculate the range of the flash at full power, divide the Guide Number by the aperture. If, for example, the flash unit has a Guide Number of 34 m or 111 ft (ISO 100, 20 °C/68 °F); its range at an aperture of f/5.6 is 34÷5.6 or about 6.1 meters (or in feet, 111÷5.6=approximately 19 ft 10 in.). For each twofold increase in ISO sensitivity, multiply the Guide Number by the square root of two (approximately 1.4). 118