\begin{table}%t3
\caption{Interference filters.}
\label{filters}
%\centering
\small
\begin{tabular}{lllll}
\hline
\hline
Filter & $\lambda_{\rm c}$ (\AA) & Peak trans. & {\it FWHM} (\AA) & Effec. width (\AA) \\
\hline
H$\alpha$ & 6563 & 66.4\% & 9.8 & 5.4 \\
Cont.     & 6450 & 95.0\% & 127 & 114 \\
\hline
\end{tabular}
\end{table}