Completeness functions for the F275W, F336W, and F435W filters (from left to right) for sources detected at ﹩\gt 5\sigma ﹩. The top panel shows the completeness as a function of magnitude only, whereas in the bottom panel, completeness is plotted as a function of magnitude and galaxy size. The dashed lines show where the completeness drops to 50%. The F435W (B-band) half-light radius (HLR) is used as a proxy for galaxy size. From the bottom panels, it is evident that galaxy size has a significant impact on the completeness—extended sources are missed more often than the more compact ones, even when they have the same magnitude.