Left: expected normalized distributions ω as a function of the redshift of the lensed sources (z_s) and of the deflectors (z_d). For comparison, we also include the normalized redshift distribution of the sources (ω_QSO). The simulations were made assuming θ_min = 0.2′′. We indicate the median value of each distribution (, and ). Right: normalized distribution of the lensed sources as a function of the apparent magnitude. For comparison, we show the DNCF as a function of the magnitude of all the detected sources, normalized by N_QSO/ Ω_Gaia.