  136 stars which were known to be the members of open cluster NGC 752 were
observed at R band with ROTSE-IIId telescope located at the Turkish National
Observatory (TUG) site. The data had been evaluated together with BV and 2MASS
photometric data. A new practical method for separating dwarf and giant was
described and applied. Evaluating the colour magnitude--diagrams with Padova
isochrones revealed metallicity similar to the Sun and an age of 1.41 Gyr for
the open cluster NGC 752.
