Metallicity gradient in NGC 7793. Filled triangle symbols are inner disk [O/H] abundances from the works of Edmunds & Pagel (1984) and Webster & Smith (1983); the solid line shows a linear fit to these abundances. Outer disk metallicity profiles are linear fits to radially binned metallicities presented in this work. Different line styles denote abundance profiles derived using different isochrone sets; ages and [α/Fe] ratios of these isochrones are shown in the top right. For clarity, we only show binned metallicities that were used to derive the abundance profile for one isochrone set (filled circles). Error bars represent the mean value of abundance uncertainties in each bin.