(K,V − K) CMD of NGC 2808 obtained from the combination of our GeMS photometry and the HST/ACS catalogue of (Sarajedini et al. 2007). The left panel shows the CMD of the entire GeMS sample, fit by a theoretical model taken from (VandenBerg et al. 2012). An Y-enhanced model (Y = 0.33) is also plotted in cyan for sake of comparison. The right panel shows only stars belonging to the best chip 2 and the corresponding ridge line is superimposed in red. HB stars are highlighted with thick symbols.