Comment on "Finite Conductance Governs the Resonance Transmission of   Thin Metal Slits at Microwave Frequencies"
  We provides quantitative agreement with the experiment of Ref [J.R.Sucking et al,Phys. Rev. Lett. 92, 147401 (2004)], and can account for the effects of the finite conductivity with a small modification to the effective wavelength. 
Shuwen Chen and Reuven Gordon
physics.optics