Distributions of apparent integrated magnitudes for the J,H,K_S passbands of the MWSC survey. The open histograms correspond to the whole MWSC sample, the hatched histograms show the distributions of the absolutely brightest clusters (M_KS< −6.75), whereas the filled histograms is for the distributions of the absolutely faintest clusters (M_KS> −1.5). Bars indicate Poisson errors. Vertical solid lines indicate the adopted completeness magnitudes Î(P) of the MWSC sample. The vertical dashed lines mark the completeness magnitudes estimated for the COCD sample. The double black curve shows the modelled distribution of clusters.