S/N of the extracted Ηα-complex measurements (red) and extracted continuum measurements (green) normalised by the median S/N for sources with a disk half-light radius (R50) of 0.″25 as a function of the disk R50. The lines and error bars show the normalised median S/N and MAD values calculated in disk R50 bins including a fixed number of 50 sources. Results are presented for a sub-sample of 1248 sources with all morphological parameters set at their default value (see Sect. 2.3.2) except the disk R50, which varies from 0.″1 to 2″.