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QNexus links Quantum Qflash T5d-R or X5d-R to the wireless TTL systems of Canon and Nikon. QNexus reads the Canon or Nikon wireless infrared (IR), signals to command Qflash in manual, automatic, TTL, and TTL-Ratio.Use any number of dedicated Qflash 5d-R s or X5d-R s as remotes, controlled totally from your camera s master flash menu. QNexus supports all Canon and Nikon wireless flash functions* from as far away as 100-200 feet! ** The higher sensitivity of QNexus provides more than a 50% increase in range over camera manufacturer s flash.Each Qflash equipped with QNexus gives you an additional 150 watt-seconds (with Qflash T5d-R), and up to 400 watt-seconds (with X5d-R) of beautiful, studio-quality lighting to dramatically expand your creative options. Camera manufacturer s flash is typically only 50 watt-seconds.