Left panel: estimated K-correction for the F775W filters to the R band as a function of z. It is important to highlight that the linear fit applies to the observed correlation of the S0 and E/S0 galaxies of the sample. The intensity levels of the linear fit represent the 1, 2 and 3σ confidence regions of the fit. Right panel: stellar mass for the initial red sequence sample vs. z. Consult the legend in the figure for the morphological classification.