Godox GD-C3R 16 Channels Wireless Shutter for Cannon EOS Transmitter Distance: 30m (open area) Support Camera Models: Canon EOS 7D, 50D, 40D, 30D, 5D, 20D, 10D, 5D Mark II,1DMark IV, 1Ds Mark III, 1D Mark III, 1D Mark II N, 1Ds Mark II, 1D Mark II, 1Ds, 1D, 1V, EOS 3, D2000