Left: CMD of all the stellar and probably-stellar sources, including Milky Way foreground and genuine NGC 6822 stars. Middle: CMD of the non-stellar sources from the original photometric catalogue in the direction of NGC 6822. Right: CMD of the stellar and probably-stellar sources from the centre of the observed area – MW foreground contamination is still present but the CMD is dominated by sources belonging to NGC 6822. The peak belonging to the M-type stars and the diagonal branch generated by the C-type stars are more easily distinguished here.