  We demonstrate that a hexagonal two dimensional photonic crystal can act as
an isotropic medium with an effective refractive index n_eff = -1, therefore
capable of unrestricted superlensing. We study the superlensing by calculating
the photonic band structure, and the propagation maps of the electromagnetic
waves through slabs of the photonic crystal. We investigate the surface, and
the crystal disorder effects on the superlensing, by analyzing the light
intensity profile at the image of a line source.
