The photometric errors for the simulated MICADO/MAORY images in I,J,H, and K_s filters. The results are given for 5 different surface brightnesses (μ_V), corresponding to the CMDs in Fig. 7. Highlighted (in red) is the case for a surface brightness, μ_V = 19 mag/arcsec², in each filter. This corresponds to a distance of  ~25 arcsec from the centre of a typical giant elliptical galaxy, like NGC 4472.