\begin{table}%t2 \caption{\label{seven}The open clusters with very low [Fe/H] estimates from Tadross (\cite{Tadross2001}) and the comparison with those from Tadross (\cite{Tadross2003}).} %%\centerline {\small \begin{tabular}{lcccrrcccrrrr} \hline \hline Cluster & & [Fe/H]$_{01}$ & [Fe/H]$_{03}$ & \multicolumn{1}{c}{$d$} & \multicolumn{1}{c}{$\sigma$} & $N$ & $E(B-V)$ & $\sigma$ & $N$ & \multicolumn{1}{c}{Age} & \multicolumn{1}{c}{$\sigma$} & $N$ \\ & & [dex] & [dex] & \multicolumn{1}{c}{[pc]} & \multicolumn{1}{c}{[pc]} & & [mag] & [mag] & & [Myr] & [Myr] \\ \hline Berkeley 7 & C0150+621 & $-$1.75 & $-$0.25 & 2509 & 195 & 3 & 0.80 & 0.00 & 3 & 4 & 1 & 3 \\ Berkeley 30 & C0655+032 & $-$2.67 & +0.10 & 3990 & 1140 & 5 & 0.50 & 0.07 & 5 & 565 & 350 & 5 \\ Berkeley 60 & C0015+606 & $-$2.26 & $-$0.77 & 3245 & 1634 & 2 & 0.62 & 0.35 & 2 & 160 & 3 & 2 \\ Berkeley 62 & C0057+636 & $-$2.39 & $-$0.85 & 2063 & 400 & 6 & 0.84 & 0.04 & 6 & 17 & 12 & 6 \\ NGC 581 & C0129+604 & $-$1.54 & $-$0.85 & 2569 & 229 & 9 & 0.41 & 0.03 & 10 & 21 & 9 & 11 \\ NGC 1750 & C0500+235 & $-$1.97 & $-$0.69 & 646 & 20 & 3 & 0.34 & 0.01 & 3 & 217 & 30 & 3 \\ NGC 2244 & C0629+049 & $-$1.77 & $-$0.46 & 1595 & 119 & 9 & 0.46 & 0.03 & 10 & 5 & 2 & 10 \\ \hline \end{tabular}} \tablefoot{The cluster parameters are based on the list by Paunzen \& Netopil (\cite{Paunzen2006}).} \end{table}