Comment on Guiding, Focusing, and Sensing on the Subwavelength Scale Using Metallic Wire Arrays

This is a comment on Guiding, Focusing, and Sensing on the Subwavelength Scale Using Metallic Wire Arrays by G. Shvets, S. Trendafilov, J. B. Pendry and A. Sarychev published in Phys. Rev. Lett. 99, 053903 (2007), which demonstrates that the endoscope proposed in the letter does not demonstrate satisfactory subwavelength imaging performance.