Completeness as a function of input magnitude for the VIS (top) and NISP (bottom) filters. Blue and red curves represent the recovery fraction in the external regions and the core region of the cluster, respectively. The horizontal dashed line indicates the 50% completeness level. In the outskirts of the cluster, the 50% threshold is reached at m ≈ 26 for VIS and m ≈ 24 for NISP, while crowding in the core shifts these limits to about 1 mag brighter. No quality cuts have been applied.