Estimates of log g and [Fe/H] for stars in M 67. Error bars denote the errors returned by SME. The yellow circle denotes YBP-1194. Blue circles denote blue stragglers. Green circles denote variable stars. White circles denote binary stars. Red circles denote red giants. Black circles denote other stars. The red line denotes the best-fit line given by the Deming regression. One star with σ_Teff >  500 K has not been included.