\begin{table}%t3
\caption{Main characteristics of the three instrumental setups used for 
our survey.             
\label{table3}   }   
%\centering
\par
\begin{tabular}{c c c c c}     % 7 columns 
\hline\hline       
Filter       & $\lambda_{\rm c}$ &  {\it FWHM}    & Camera  & Field of view             \\
             & ($\mu$m)    & ($\mu$m) &         & (arcsec~$\times$~arcsec)  \\
\hline                    
{NB}\_1.26     & 1.257 & 0.014 & S13 & $13$~$\times$~$13$ \\
{NB}\_1.64     & 1.644 & 0.018 & S13 & $13$~$\times$~$13$ \\
{NB}\_2.17     & 2.166 & 0.023 & S27 & $27$~$\times$~$27$ \\    
\hline                  
\end{tabular}
\end{table}