A comparison of the total stellar mass of galaxies in the wings sample, as computed by means of B and V band photometry, on the x-axis, assuming the prescriptions given in (Bell & de Jong 2001, see text for details), and by means of our spectral fitting. The solid line represents the 1:1 relation. A colour correction term, computed as explained in the text, was applied to the spectroscopic-derived values, while the photometric values were corrected to account for the difference in the IMF mass limits.