Binned CMDs for NGC 6656 stars in Field 10-8 (l,b) = (2.91°, − 7.96°) with n_fit ≥ 6. The stars have been selected kinematically using the small kinematic dispersion of the cluster proper motions. The parameter n_fit corresponds to the minimum number of exposures fitted by the proper motion solution of each star. Some plots have been color-coded using the proper motions and derived dispersions. Top row, left to right: stellar density, mean longitudinal proper motion, mean latitudinal proper motions. Bottom, left to right: unbinned CMD, longitudinal dispersion in proper motions, latitudinal dispersion in proper motions.