Close-up of SDO/HMI continuum intensity pixels near the solar limb. Left: Continuum intensity from the hmi.Ic_45s data product, normalised to the mean intensity at disc centre. Right: Corresponding normalised intensity after PSF deconvolution, from the hmi.Ic_45s_dcon data product. The associated μ values are computed from the metadata of the hmi.Ic_45s data product. The solid line marks the solar limb; dashed lines indicate the outermost bin-width (used in Fig. 6); and the dotted line shows the μ = 0.1 contour for reference.