The Nikon SB-900 offers a range of advanced features, including an advanced wireless control system by which multiple SB-900, SB-800 and SB-600 Speedlights can be controlled from a single master ...

Flash photography has been a particular strength of Nikon SLRs for some time now, and the D5100 retains the company's implementation of Nikon's 3D Color Matrix II metering for flash exposures.