The relative completeness functions. The fraction of galaxies with an observed spectrum of spectroscopic type 1 or 2 for which we could measure velocity dispersions and obtain reliable photometric structural parameters. This relative completeness is shown for the clusters (top row) and the field (bottom row) as a function of galaxy magnitude in the I band in a 1 arcsec radius aperture. Colors code the spectral type (black: 1; red: 2). The full lines indicate the full redshift range, the dotted lines galaxies with z < 0.6, and the dashed lines galaxies with z ≥ 0.6. The dots show the magnitudes of the single galaxies and the assigned completeness weight.