Appendix: What’s This Button Do?
THE NIKON SB-900, SB-800, and SU-800 Wireless Speedlight Commander can be used to control other SB-900, SB-800, SB-600, and SB-R200 Speedlight units wirelessly. To do so, the SB-900 or SB-800 Speedlight must be connected to any i-TTL–compatible camera’s hot shoe to enable these Speedlights (or SU-800 Wireless Commander) as a “Master Flash Unit.” In other words, check your camera’s manual. This wireless stuff generally applies to the recent generation of DSLR cameras.
Setting the SB-900 as a Master Flash Unit
(Say the above using the voice of Optimus Prime from the Transformers movie.) ...
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