High-resolution CRISP data connecting the solar chromosphere (top) and photosphere (bottom). The top two panels show a line core Ca II 854.2 nm image of the quiet Sun, and the LOS magnetic field obtained from a polarimetric scan through the same line. The inversion with the Ca II 854.2 nm data uses the weak-field approximation with spatio-temporal coupling (de la Cruz Rodríguez & Leenaarts 2024) and the chromospheric LOS magnetic field map shown is clipped outside ±50 G. The lower two panels show an image recorded in the continuum near the Fe I 617.3 nm line, and the LOS magnetic field obtained from a regularised Milne-Eddington inversion of a polarimetric scan through the same line. The photospheric LOS magnetic field map shown is clipped outside ±25 G.