Transfer functions, 1D (left) and 2D (right), describing the filtering induced by data processing for the 150 GHz map in Fig. 2. The coloured lines in the left panel represent the values of the 2D transfer function for the directions shown with the same colours in the right panel. Grey-shaded areas correspond to the NIKA2 field of view (for small angular frequencies) and beam FWHM (for large angular frequencies) instrumental limits.