The SB-600 (SB = System Lightning) differs in terms of performance of its sister model, the SB-800, by the smaller guide number 30, based on ISO 100 and a zoom position of its reflector of 35mm. The reflector occupies in coordination with design and setting of the lens Zommpositionen to 85 mm (in conjunction with a Nikon digital camera fully automatic). Specially tailored to the DSLRs of your own home also are still the possibilities of flash exposure compensation, and the storage of the Flash Exposure measured value given. The device only supports Nikon's i-TTL technology and the Advanced Wireless Lighting (wireless multiple flash photography with multiple devices simultaneously).
The person to whom this does not say anything, does not need to be worried. Thanks to the fully automated communication between the flash unit and the camera can also plug it in and forget about the device. In the automatic programs him no faulty exposures will succeed.
The only downside is the price. Other manufacturers offer system compatible devices for Nikon DSLRs on, often with higher light output at a lower price. Whether such combinations, however, the perfect interplay of the originals is always guaranteed and if the otherwise excellent Nikon support, which can usually solve all problems immediately, then is also in the picture, I can not judge.