Nikon D300s Nikon Creative Lighting System CLS, CLS-Compatible Flash Units, 348, Guide Number

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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-900, SB-800, SB-600, SB-400, and SB-R200:

	Flash unit
Feature		SB-900 1	SB-800	SB-600	SB-400	SB-R200	2
Guide	ISO 100	34/111	38/125	30/98	21/69	10/33
No. 3	ISO 200	48/157	53/174	42/138	30/98	14/46

1If a color filter is attached to the SB-900 when vor N (flash) is selected for white balance, the camera will automatically detect the filter and adjust white balance appropriately.

2Controlled remotely with built-in flash in commander mode or using optional SB-900 or SB-800 flash unit or SU-800 wireless Speedlight commander.

3m/ft., 20 °C (68 °F), SB-900, SB-800, and SB-600 at 35 mm zoom head position; SB-900 with standard illumination.

•SU-800 Wireless Speedlight Commander: When mounted on a CLS- compatible camera, the SU-800 can be used as a commander for remote SB-900,SB-800,SB-600, or SB-R200 flash units. The SU-800 itself is not equipped with a flash.

AGuide Number

To calculate the range of the flash at full power, divide the Guide Number by the aperture. For example, at ISO 100 the SB-800 has a Guide Number of 38 m or 125 ft. (35mm zoom head position); its range at an aperture of f/5.6 is 38÷5.6 or about 6.8 meters (or in feet, 125÷5.6=approximately 23 ft. 7 in.). For each twofold increase in ISO sensitivity, multiply the Guide Number by the square root of two (approximately 1.4).

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