Euclid view of NGC 6397 and comparison with HST. The top-centre panel presents a colour stacked image (red=NISP H_E, green=NISP J_E, and blue=NISP Y_E) of the entire field of NGC 6397 covered by the ERO data. The four zoom-ins (blue squares) highlight various regions in the outskirts of the field. The magenta box is centred on the core of the cluster. A zoom-in on this region is shown in the three bottom panels. The leftmost panel is taken from the NISP Y_E-filter stacked image, while the middle panel refers to the VIS I_E-filter data. The empty space in the leftmost panel is an artefact of the stacking process. As a comparison, a view of the same region taken with HST’s Wide Field Camera of the Advanced Cameras for Surveys in the F814W filter (Nardiello et al. 2018) is shown in the rightmost panel. In all these panels, north is up and east is to the left. All plots are on a logarithmic grey scale, with minimum and maximum values tailored in each image to enhance the faint details.