\begin{table}%t1
\caption{Wavelength regions, covered by our spectra with different
cameras.}
\label{table:regions}
%\centering
\par
\begin{tabular}{lll}   \hline                                             \hline
   {HPC-1}          &  {Orbis-1}        &  {Newton DU-970N} \\     \hline
                %      &                      &                     \\
  H$\alpha$~(1800)   &  H$\alpha$~(1800)   & H$\alpha$~(1800)   \\
  $6500{-}6750$~\AA    &  $6490{-}6620$~\AA    & $6475{-}6740$~\AA    \\
                      &                      &                     \\
  H$\alpha$~(1200)   &  H$\alpha$~(1200)   & H$\alpha$~(1200)   \\
  $6200{-}6900$~\AA    &  $6230{-}6620$~\AA    & $6130{-}6900$~\AA    \\
                      &                      &                     \\
  H$\beta$            &  H$\beta$            & H$\gamma$-H$\beta$  \\
  $4200{-}5050$~\AA    &  $4610{-}5040$~\AA    & $4200{-}5120$~\AA    \\
                      &                      &                     \\
                      &  H$\delta$-H$\gamma$ &                     \\
                      &  $3930{-}4400$~\AA    &                     \\ \hline
\end{tabular}
\end{table}