Magnitude difference (top) and colour difference (bottom), as a function of the input g-magnitude, between the injected and recovered artificial stars in the tile 7_26. We displayed only stars in the colour interval 0 ≤ g_inp − i_inp ≤ 1, which is typical for MC stars. Grey points show the position in these panels of each recovered artificial star, selected in the above-mentioned colour interval. Red dots and error bars indicate the mean magnitude/colour difference and their standard deviations in bins of g_inp = 0.25 mag.