Distribution of clusters selected in the top-hat cosmological redshift window compared with the clusters selected in the top-hat photometric redshift window. Filled histograms correspond to distribution of clusters as a function of cosmological redshift when the top-hat selection is done using the cosmological redshift within the range 0.4 < z < 0.7. Solid blue lines correspond to distribution of clusters as a function of cosmological redshift when the top-hat selection is done using the different photometric uncertainties we have used (σ_z/ (1 + z_c) = 0.005, 0.010, 0.030 and 0.050) with the range 0.4 < z < 0.7 and the dashed blue lines correspond to the distribution of clusters as a function of cosmological redshift when the top-hat selection is done using photometric redshifts outside the range 0.4 < z < 0.7.