Upper panel: histograms of the MMT-photo-z matched catalogue as a function of MMT r′ magnitude: Plotted are all matches (thick black line) and the subset of matches with photo-zs passing all quality criteria (“high quality”, blue line). Lower panel: fractions of galaxies z_ph > 0.45 within: all MMT-photo-z matches (thick black line), the “high quality” matches (blue line), and of high-quality matches z_ph > 0.45 within all (dashed red line). A thin dotted line gives the magnitude cut at m_faint = 21.9.