(a)–M_phot vs. M_dyn for 95 galaxies in the SPARC sample, colour-coded by p(> χ²). Empty circles show galaxies with poor SED fits: p(> χ²)< 0.05. (b)–Υ_dyn (light blue squares) and Υ_phot (filled circles, colour-coded as in panel a) vs. L_3.6. Error bars on Υ_dyn, not displayed for clarity, vary from ±0.3 for the faintest galaxies to ±0.1 for the brightest. Υ_phot increases gradually from ∼0.2 to ∼0.7 across more than 4 dex in L_3.6. (c)–Distribution of Υ_phot (orange-filled histogram) and Υ_dyn (blue empty histogram). Galaxies with poor SED fits have been removed. The arrows show the medians of the distributions. The purple-edged circles in panels a and b show systems with f_b >  0.2.