Total r′-band apparent magnitudes (m_r′) and effective radii (R_e) are shown for the late-type (blue symbols) and early-type (red symbols) galaxies of the FDSDC. The vertical and horizontal dashed lines show the minimum magnitude (M_r′ >  −19 mag) and minimum size limits (a >  2 arcsec) of the sample, respectively. The solid line shows the selection curve resulting from the SExtractor detection. An object can be detected is it has diameter larger than 4 arcsec at the 26.5 mag arcsec⁻² isophote. The upper x-axis and the right y-axis show the absolute magnitudes and effective radii of the galaxies at the distance of the Fornax cluster.