\begin{table}%t2
%\centering
\small\caption{Filter characterictics.}\label{tab:filt}
\begin{tabular}{llll}
\hline\hline
Filter & $\lambda$(\AA) & $\Delta\lambda$(\AA) & Peak transmission \\
\hline
$B$ & 4310 &~950 & 85\% \\
$V$ & 5370 &~940 & 90\% \\
$R$ & 6580 & 1300 & 85\% \\
$I$ & 8223 & 2164 & 91\% \\
\hline
\end{tabular}
\end{table}