Comparison between photometric median redshifts of our good sources (RELFLAG = 1) and the spectroscopic estimate for M0717 (left) and M1149 (right). Filled circles represent best quality spectroscopic redshifts (Q = 4). In the lower panels we show Δz/ (1 + z) = (z_spec − z_phot) / (1 + z_spec) as a function of the spectroscopic redshift. In the inner small panels the distribution of Δz/ (1 + z) is shown together with its average (vertical line) and rms after excluding outliers, as discussed in the text.