Magnitude and redshift distributions of the cluster member galaxies and multiple images considered in the lens models. Top: distribution of cluster member galaxies as a function of their magnitudes in the HST/F160W filter. The photometric sample of cluster members used in our lens model is plotted in gray, with the spectroscopic members pictured in blue. Cluster members with a reliable measurement of their internal stellar velocity dispersion are highlighted in red. Bottom: redshift distribution of the observed 90 multiple images used to constrain the reference lens model described in this work.