\begin{table}%T5
\caption{\label{t:tab4}Comparison with previous distance determinations using the Main
Sequence Fitting method based on Hipparcos parallaxes for the local subdwarfs.
Errors quoted are those given in the original papers; they have different
meanings from the present error bar.}
%\centering
\par
\begin{tabular}{lccc}
\hline\hline
Author         & $[$Fe/H$]$ & $E(B-V)$ & $(m-M)_V$ \\
\hline
\multicolumn{4}{c}{NGC 6397}\\
Reid (\cite{Reid1998})            & $-1.82$ & 0.19  & $12.83\pm 0.15$ \\
This paper           & $-2.03$ & 0.183 & $12.58\pm 0.08$ \\
\multicolumn{4}{c}{NGC 6752}\\
Reid (\cite{Reid1998})            & $-1.42$ & 0.04  & $13.28\pm 0.15$ \\
Carretta et~al. (\cite{Carretta2000}) & $-1.43$ & 0.035 & $13.32\pm 0.04$ \\
This paper           & $-1.43$ & 0.040 & $13.24\pm 0.08$ \\
\multicolumn{4}{c}{47~Tuc}  \\
Reid (\cite{Reid1998})            & $-0.70$ & 0.04  & $13.68\pm 0.15$ \\
Carretta et~al. (\cite{Carretta2000}) & $-0.67$ & 0.055 & $13.57\pm 0.09$ \\
Percival et~al. (\cite{Percival2002}) & $-0.7$ & 0.04 & $13.37\pm 0.11$ \\
Grundahl et~al. (\cite{Grundahl2002}) & $-0.67$ & 0.04  & $13.33\pm 0.10$ \\
This paper           & $-0.66$ & 0.024 & $13.50\pm 0.08$ \\
\hline
\end{tabular}
\end{table}