Point-source photometry and astrometry using the E-ELT simulation shown in Fig. 9. The differences in magnitude (top panel) and in position (bottom panel) with respect to the true values are shown as a function of S/N. The shaded area represents the photometric uncertainty in the data, as expected from the photon shot-noise. In the lower panel the astrometric accuracy is given in pixel units of the original image.The dotted line shows the 0.2 pixel limit. Most of the point sources with S/N> 20 are below this line.