\begin{table}%t1
\caption{\label{general}General properties of the \ks-band selected \rzk survey. 
The astrometric and photometric precision are quoted at $1\sigma$.}
\small
%\centering
\par
\begin{tabular}{cccc}
\hline\hline
    Filter  &    Astr. prec.  &  Phot. prec.  &   Mag limit \\
   \hline 
   $R$         &     0.3$''$  	 &     0.02	  &	     22.5\\
   $z'$        &     0.3$''$  	 &     0.02	  &	     21.0\\
   $K_{\rm s}$       &     0.5$''$   	 &     0.07	  &	     18.0\\
   \hline
\end{tabular}
\end{table}