It's a calibrated 709 field monitor! No, a 10-bit 4:2:2 recorder! It's Ninja Blade or Samurai Blade! by Allan Tépper - ProVideo Coalition
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Amazon.com : Atomos Ninja Blade 5" HDMI On-Camera Monitor & Recorder for Canon Canon EOS 5D Mark III, EOS-1D C, EOS C100, EOS C500, XF305, XF300, XF105, XF100, XA10, HF G30, EOS