Question: can sb 600 be used as a slave?
Answer: The Nikon SB-600 Speedlight is designed to be a stand-alone i-TTL flash or a remote wireless slave flash for the CLS system. It does not have a Master mode like the SB-800 does. It is a simple but powerful Speedlight flash and does a great job as a slave for your D700 or a commander device to control.