Surface-brightness profiles of example models of three Sérsic-type galaxies (the upper panels a)–c)) and three face-on disc galaxies (the lower panels d)–f)) that illustrate effects of a radial truncation of PSF_K71 and PSF_V,0m. The three columns show: a) and d) two small galaxies; b) and e) two intermediate-size galaxies; and c) and f) two large galaxies. In each panel, the galaxy model profile is drawn with a thick black solid line, and the model profiles that were convolved with PSF_K71 (PSF_V,0m) are drawn with thin purple (blue) lines. The profile of the model that was convolved with the complete PSF is drawn with a thin solid line. Profiles are also shown where each PSF was truncated at r_tr,1 (r_tr,2) with a dotted (dash-dotted) line in each panel; a) and d) r_tr,1 = 4″ and r_tr,2 = 10″; b) and e) r_tr,1 = 10″ and r_tr,2 = 25″; c) and f) r_tr,1 = 10″ (lines fall atop the model lines and are not visible) and r_tr,2 = 250″ (Table A.2). The dash-tripple-dotted lines show the result of one-dimensional models that were convolved with the respective one-dimensional PSF.