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Cls-compatible flash units – Nikon D90 User Manual

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❚❚CLS-Compatible Flash Units

The D90 can be used with the following CLS-compatible flash units: the SB-900,
SB-800, SB-600, SB-400, SB-R200, and SU-800.

The SB-900, SB-800, SB-600, SB-400, and SB-R200
The principal features of these flash units are listed below.

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.

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.

A

Guide 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. (35 mm 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).

Flash unit

SB-900

1

SB-800

SB-600

SB-400

SB-R200

2

Feature

Guide No.

3

ISO 100

34/111

38/125

30/98

21/69

10/32

ISO 200

48/157

53/175

42/138

30/98

14/49

Auto power zoom (mm)

17–200

24–105

24–85

4

5

Wide panel (mm)

12, 14, 17

14, 17

14

Head rotation

7 ° down, 90 ° up,

180 ° left/right

7 ° down, 90 ° up,

180 ° left,

90 ° right

90 ° up, 180 ° left,

90 ° right

90 ° up

60 ° down (toward

lens light axis),

45 ° up (away from

light axis)

1 If a color filter is attached to the SB-900 when AUTO or

N (flash) is selected for white balance, the camera

will automatically detect the filter and adjust white balance appropriately.

2 Controlled remotely with built-in flash in commander mode or using optional SB-900, SB-800 flash unit

or SU-800 wireless Speedlight commander.

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

illumination.

4 27 mm zoom coverage.
5 24 mm zoom coverage.