  Imaging with sub-wavelength resolution using a lens formed by periodic
metal-dielectric layered structure is demonstrated. The lens operates in
canalization regime as a transmission device and it does not involve negative
refraction and amplification of evanescent modes. The thickness of the lens
have to be an integer number of half-wavelengths and can be made as large as
required for ceratin applications, in contrast to the other sub-wavelength
lenses formed by metallic slabs which have to be much smaller than the
wavelength. Resolution of $\lambda/20$ at 600 nm wavelength is confirmed by
numerical simulation for a 300 nm thick structure formed by a periodic stack of
10 nm layers of glass with $\epsilon=2$ and 5 nm layers of metal-dielectric
composite with $\epsilon=-1$. Resolution of $\lambda/60$ is predicted for a
structure with same thickness, period and operating frequency, but formed by
7.76 nm layers of silicon with $\epsilon=15$ and 7.24 nm layers of silver with
$\epsilon=-14$.
