Magnitude distribution histogram for the 121 461 new quasars in the LQAC4 for which DSS images and the morphological indexes were searched for and calculated. The percentage counts are obtained in 0.1 magnitude bins. The magnitudes are nearly all R, or otherwise in the closer optical band available. The average magnitude is 20.86, and the mode is 21.45, which values are as those of the LQAC3 version. No dependence of the morphological indexes with magnitude is found.