\begin{table}%t5
%\centering
\par
\caption{\label{table:comp}External comparison of redshift.}
\small \begin{tabular}{lccc}
\hline\hline
Sample & Offset & Scatter & $N$ \\
& km~s$^{-1}$ & km~s$^{-1}$ & \\
\hline
WINGS--NOAO-FPS & $3\pm3$ & $70$ & $676$\\
WINGS--SDSS & $11\pm5$ & $75$ & $217$\\
WINGS--NED & $8\pm3$ & $90$ & $1108$ \\
\hline 
\end{tabular}
\end{table}