Magnitude distributions and photometric resolution for field lm055 (left, a field of typical density) and field lm001 (right, a very dense field). The histograms show the distribution of B_eros in blue and R_eros in red on a linear vertical scale, and the lines correspond to the r.m.s. magnitude resolutions as a function of R_eros and B_eros in logarithmic scale. The dashed blue and red lines represent the photometric uncertainties for B_eros and R_eros, as estimated by the PEIDA fitter, and the adjacent dotted blue and red lines were derived from the light-curve dispersion of the data points.